Content Provider
WikiBooks - Open-content textbooks
164
Biodiversity Heritage Library (BHL)
20
University of Copenhagen: Research
12
Unknown
7
Aarhus University: Research
6
OLAC: Open Language Archives Community
5
Oxford University Press
5
Oxford University Press (via Crossref)
5
UNESDOC - UNESCO Digital Library
5
Cambridge University Press
4
Texas A&M University Digital Repository
4
David Rumsey Historical Map Collection (Cartography Associates)
3
De Gruyter
3
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
3
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
3
Lund University Publications (LUP)
3
Springer Nature (via Crossref)
3
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2
Arctic Portal Library
2
Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA): citaREA
2
HELDA – University of Helsinki Open Repository
2
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
2
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
2
NORA (National aggregator of open repositories of Russian universities)
2
School of Oriental and African Studies, University of London: SOAS Research Online
2
The Czech Academy of Sciences: Publication Activity (ASEP)
2
University of Groningen research database
2
Université de Nantes: HAL-UNIV-NANTES
2
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
2
ARPI - Archivio della Ricerca dell'Università di Pisa
1
Aberdeen University Research Archive (AURA)
1
Australian National University: ANU Digital Collections
1
BRGM: HAL (Bureau de Recherches Géologiques et Minières)
1
Biblioteca Digital de Aranjuez
1
Biblioteca Digital de Castilla-La Mancha (BIDICAM)
1
Brigham Young University (BYU): Digital Collections
1
CGIAR CGSpace (Consultative Group on International Agricultural Research)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Digitale Bibliothek Mecklenburg-Vorpommern (Greifswald University)
1
Diponegoro University: Institutional Repository (UNDIP-IR)
1
Galiciana: Biblioteca Dixital de Galicia (Digital Library of Galicia)
1
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
1
Informa (via Crossref)
1
International Development Research Centre: IDRC Digital Library
1
JSTOR (via Crossref)
1
LaCRIS - University of Lapland Current Research System
1
MINES ParisTech: Open Archive (HAL)
1
MTAK: REAL (Library and Information Centre of the Hungarian Academy of Sciences
1
National Library of Estonia: DIGAR - Digital Archiive
1
more ...