Content Provider
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Oxford University Press (via Crossref)
612
Oxford University Press
610
HELDA – University of Helsinki Open Repository
590
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
576
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
553
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
534
Wageningen UR (University & Research Centre): Digital Library
531
Washington State University: WSU Libraries Digital Collections
522
Theses Canada/Thèses Canada (Library and Archives Canada)
515
National Research Council Canada: NRC Publications Archive
503
University of Groningen research database
487
University of Florida: Digital Library Center
470
Polar Research (E-Journal)
445
SAGE Publications (via Crossref)
440
Digital.CSIC (Spanish National Research Council)
438
University of Southampton: e-Prints Soton
432
WikiBooks - Open-content textbooks
426
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
421
eCite UTAS (University of Tasmania)
417
Université Grenoble Alpes: HAL
403
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
402
Apollo - University of Cambridge Repository
394
Natural Resources Institute Finland: Jukuri
392
University of California: eScholarship
390
Umeå University: Publications (DiVA)
366
White Rose Research Online (Universities of Leeds, Sheffield & York)
366
École Polytechnique, Université Paris-Saclay: HAL
365
Vrije Universiteit Amsterdam (VU): Research Portal
358
Aalborg University's Research Portal
353
Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources)
352
University of the Highlands and Islands: Research Database of UHI
350
ETH Zürich Research Collection
345
DIAL@USL-B (Université Saint-Louis, Bruxelles)
341
Université de Paris: Portail HAL
341
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
330
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
324
BioOne Online Journals
322
University of Bristol: Bristol Research
322
Cambridge University Press (via Crossref)
317
ACS Publications
310
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
309
Muséum National d'Histoire Naturelle (MNHM): HAL
305
University of Southern Denmark Research Portal
305
University College London: UCL Discovery
304
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
299
University of Tromsø: Septentrio Academic Publishing
292
MSpace at the University of Manitoba
287
Carleton University's Institutional Repository
278
University of Wisconsin Press (UW Press - via Crossref)
275
Jultika - University of Oulu repository
274
more ...