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Meta Indexes of Online Education@

Search in scholarly data sources

AJE Scholar articles.
Keeping Up with the Literature: 5 Ways to Track and Read Research Online (by Theresa Andersen, University of Georgia).
Tools for sorting through the millions of articles published every year.

arXiv is a free distribution service and an open-access archive.
You may be interested in the arXiv Wikipedia page.

! BASE. Created and developed by Bielefeld University Library, Germany (search technology provided by FAST Search & Transfer, Norway). This is a multi-disciplinary search engine for academically relevant web resources. Excellent!
For further information see here (Wikipedia entry).

This is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science.
See also here (Wikipedia entry).

Core. (you may be interested in the Wikipedia page).
CORE (COnnecting REpositories), a not-for-profit service, provides a comprehensive bibliographic database of the world’s scholarly literature, collecting and indexing research from repositories and journals.
CORE currently contains 281M open access articles collected from 11K data providers around the world.

Cornell University Library:
Library Research at Cornell: Find Articles.

Crossref (registered as Publishers International Linking Association, New York, USA).
Crossref, a not-for-profit membership organisation, makes research objects easy to find, cite, link, assess, and reuse.

Deutscher Bildungsserver (in German), or likewise Eduserver - Education in Germany.
The Deutscher Bildungsserver (German Education Server) provides access to documents and background information regarding the German education system and its international context. Note:
See e.g. ERIC Database / Educational Resources Information Center.

! Directory of Open Access Journals (DOAJ).
Directory of Open Access Journals.
For further information see here (Wikipedia entry).

! ERIC (Education Resources Information Center),
(sponsored by the Institute of Education Sciences (IES) within the U.S. Department of Education).
ERIC is a comprehensive, easy-to-use, searchable, Internet-based bibliographic and full-text database of education research and information.

Georef (by GeoScienceWorld, McLean, VA).
GeoRef is the most comprehensive bibliographic database in the geosciences and continues to grow by more than 100,000 references a year.

! Google Scholar.
Google Scholar provides a simple way to broadly search for scholarly literature. Focus also on fulltext search of open access journals and conference proceedings. Check out the nuts and bolts:
! Search Help.
For further information see here (Wikipedia entry).

! Important to know: Inclusion Guidelines for Webmasters (configuring the meta-tags).

M. Gusenbauer (2019): Google Scholar to overshadow them all? Comparing the sizes of 12 academic search engines and bibliographic databases. Free access, Scientometrics, 118: 177–214.
"... The exact workings of Google Scholar’s database remain a mystery
[...] Google Scholar, with 389 million records, is currently the most comprehensive academic search engine ..."

Indeed (a job website):
23 Research Databases for Professional and Academic Use.

Institute of Education Sciences (IES).
Within the U.S. Department of Education.

Johns Hopkins University, Welch Medical Library:
Which Databases to Use?

JSTOR provides access to more than 12 million journal articles, books, images, and primary sources in 75 disciplines.
For further information see here (Wikipedia entry).

D. Lewandowski and P. Mayr (2006): Exploring the Academic Invisible Web. In PDF.

Library of Congress, Washington, D.C.
One of the largest libraries in the world. Have a ook at the Wikipedia entry.

LLRX: is a free, independent, technology and research e-journal for Librarians, Lawyers, Researchers, Academics, and Journalists.
Academic and Scholar Search Engines and Sources 2021 (by Marcus P. Zillman, August 31, 2021).

P. Mayr and A.K. Walter (2007): An exploratory study of Google Scholar. In PDF, Online information review.
"... Our results show that the expanding sector of open access journals (DOAJ list) is underrepresented among the servers. Something that remains unclear is why journal articles that are freely available on web servers are not readily listed by Google Scholar even though they are searchable via the classic Google Web Search. Although Google Scholar claims to provide “scholarly articles across the web,” the ratio of articles from open access journals or the full-text (eprints, preprints) is comparably low ..."

The University of Minnesota Libraries:
How to find resources by format. Scroll down to:
"Getting to the full text of journal articles and books".

OpenAIRE is a non-profit organization with a mission to promote open scholarship and improve discoverability, accessibility, shareability, reusability, reproducibility, and monitoring of data-driven research results, globally.
The organization operates a European e-infrastructure offering a diverse set of public services.

OA Books.
The OAPEN Foundation is a not-for-profit organisation based in the Netherlands, with its registered office at the National Library in The Hague.
OAPEN is dedicated to open access, peer-reviewed books. Worth checking out:
! OAPEN Library A central repository for hosting and disseminating OA books.
! Directory of Open Access Books A discovery service indexing OA books, in partnership with OpenEdition.

! The On-line Books Page (edited by John Mark Ockerbloom, University of Pennsylvania).
An annotated index of more than 2000 books whose full text is available on-line. Search by author or by title.
The Online Books Page is a website that facilitates access to books that are freely readable over the Internet.

OpenAlex (by OurResearch with support from Arcadia).
OpenAlex is a free index of the world's research ecosystem. It is aggregating and standardizing data from a whole bunch of data sources, e.g. MAG and Crossref.
! How does OpenAlex compare to other scholarly data sources

Pangea (hosted by Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research (AWI), Center for Marine Environmental Sciences, University of Bremen).
The information system Pangea is operated as an Open Access library aimed at archiving, publishing and distributing georeferenced data from earth system research.

The goal of Paperpile is to radically simplify the workflow of collecting, managing and writing papers. Go to:
! The top list of academic research databases.

PLOS (Public Library of Science).
PLOS is a nonprofit, Open Access publisher empowering researchers to accelerate progress in science and medicine.
You may be interested in the PLOS Wikipedia page.

! PubMed (National Library of Medicine, Bethesda, MD).
PubMed is a free resource supporting the search and retrieval of biomedical and life sciences literature.
For further information see here (Wikipedia entry).

! Electronic Journals Library, University Library of Regensburg, Germany.
The Electronic Journals Library is a service to facilitate the use of scholarly journals on the internet. It offers a fast, structured and unified interface to access full-text articles online. The journals are presented in lists sorted by research area.
! Journal List by Title.
! Journal List by Subject.

Scholastica, Chicago, IL.
Software solutions to help scholarly organizations. Go to:
Guide to academic journal indexing: Where, when, and how to get indexed.

Advance research and scholarship with the world's leading database of peer-reviewed, full-text scientific, technical and health literature.
For further information see here (Wikipedia entry).

ScienceOpen (you may be interested in the Wikipedia page).
ScienceOpen is a freely accessible search and discovery platform.

Scopus (by Elsevier).
Scopus is a commecial abstract and citation database of peer-reviewed literature including scientific journals, books, and conference proceedings.
Scopus offers free features to non-subscribed users as !Scopus Preview.
For further information see here (Wikipedia entry).

Scribbr, Amsterdam, The Netherlands:
How to Find Sources | Scholarly Articles, Books, Etc.

Scribendi Chatham, ON, Canada.
Scribendi's mission is to help people around the world reach their goals through the written word. Go to:
! 21 Legit Research Databases for Free Journal Articles in 2022.
They list out the best free article databases to use in 2022.

V.K. Singh et al. (2021): The journal coverage of Web of Science, Scopus and Dimensions: A comparative analysis. In PDF, Scientometrics, 126: 5113–5142.
See likewise here.

Web of Science.
Registration required.
For further information see here (Wikipedia entry).

Wikipedia, the free encyclopedia:
Category:Academic publishing.
Citation Index.
! List of academic databases and search engines.
BASE (search engine).
Directory of Open Access Journals.
Google Scholar.

Wikipedia, the free encyclopedia (in German):
Google Scholar.

University of Windsor, Leddy Library:
Search Engines vs. Google Scholar vs. Library Databases.

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This index is compiled and maintained by Klaus-Peter Kelber, Würzburg,
Last updated January 25, 2024