Content Provider
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Dryad Digital Repository (Duke University)
5,830
Hathi Trust Digital Library
5,733
HAL Sorbonne Université
5,579
OLAC: Open Language Archives Community
5,441
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
5,423
Springer Nature
5,274
NASA Technical Reports Server (NTRS)
5,269
University of Calgary Journal Hosting
5,144
SFU Digitized Collections (Simon Fraser University)
4,933
Informa
4,829
WikiBooks - Open-content textbooks
4,608
University of Southampton: e-Prints Soton
4,532
Oxford University Press
4,426
Arctic Institute of North America (via Crossref)
4,411
Technical University of Denmark: DTU Orbit
4,343
Max Planck Society: MPG.PuRe
4,206
Institute for Marine Research: Brage IMR
4,203
Memorial University of Newfoundland: Research Repository
4,187
ArXiv.org (Cornell University Library)
4,119
Frontiers (Publisher)
3,938
Ohio State University (OSU): Knowledge Bank
3,903
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
3,877
University of Alaska: ScholarWorks@UA
3,859
Canadian Science Publishing
3,747
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
3,651
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
3,551
University of Lethbridge Digitized Collections
3,353
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
3,305
USGS Science Data Catalog (via DataONE)
3,232
SAGE Publications (via Crossref)
3,196
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
3,187
NTNU Open Archive (Norwegian University of Science and Technology)
3,158
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
3,152
Theses Canada/Thèses Canada (Library and Archives Canada)
3,109
Wageningen UR (University & Research Centre): Digital Library
3,074
IEEE Publications (via Crossref)
3,061
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
3,040
Université Grenoble Alpes: HAL
3,038
University of Tasmania: UTas ePrints
3,031
Lund University Publications (LUP)
2,934
Luleå University of Technology Publications (DiVA)
2,917
University of Alberta: Era - Education and Research Archive
2,912
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2,906
Archives ouvertes de Paris-Saclay
2,859
Umeå University: Publications (DiVA)
2,850
Hirsla - Landspítali University Hospital research archive
2,848
IEDA: Marine-Geo Digital Library (via DataONE)
2,828
Washington State University: WSU Libraries Digital Collections
2,796
Natural Resources Institute Finland: Jukuri
2,795
University of Bergen: Bergen Open Research Archive (BORA-UiB)
2,785
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