Content Provider
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Biblioteca Virtual de Defensa (BVD - Ministerio de Defensa de España)
86
Biblioteca Digital de Aranjuez
80
JSTOR (via Crossref)
80
Roskilde University Research Portal (RUC)
79
Belinki Elektronnaja Biblioteca, Yekaterinburg
78
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
74
University of North Texas: UNT Digital Library
74
Zenodo
74
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
72
GEO-LEOe-docs (FID GEO)
71
University of Lapland: Lauda
66
University of the Highlands and Islands: Research Database of UHI
66
The National Academies Press (via Crossref)
62
Galiciana: Biblioteca Dixital de Galicia (Digital Library of Galicia)
60
Arca (BC's Digital Treasures)
59
University of Groningen research database
59
USRA Houston Repository (Universities Space Research Association)
58
Biblioteca Virtual del Patrimonio Bibliográfico
57
University of St Andrews: Research Portal
56
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
55
University of Toronto Press (U Toronto Press - via Crossref)
54
Australian National University: ANU Digital Collections
52
UQAM - Université du Québec à Montréal: archipel
52
National Institute of Polar Research Repository, Japan
51
OpenEdition
46
HELDA – University of Helsinki Open Repository
43
UNBC's Digital Institutional Repository (University of Northern British Columbia)
42
University of Tartu: Dspace
42
Staatsbibliothek zu Berlin: Digitised Collections
41
Marine Institute Open Access Repository
40
Informa
39
Jultika - University of Oulu repository
39
KITopen (Karlsruhe Institute of Technologie)
38
Norsk Polarinstitutt: Brage NP
38
University of Tromsø: Munin Open Research Archive
38
Lund University Publications (LUP)
35
Norwegian Polar Institute: Brage NP
35
NIOZ Repository (Royal Netherlands Institute for Sea Research)
34
University of Bristol: Bristol Research
34
Share it - Open Access und Forschungsdaten-Repositorium der Hochschulbibliotheken in Sachsen-Anhalt
32
NORA (National aggregator of open repositories of Russian universities)
31
E-resource repository of the University of Latvia
30
University of Alaska: ScholarWorks@UA
30
Max Planck Society: MPG.PuRe
29
PRISM - University of Calgary Digital Repository
29
Umeå University: Publications (DiVA)
29
Digital.CSIC (Spanish National Research Council)
28
Digitale Sammlungen der Herzogin Anna Amalia Bibliothek Weimar (HAAB)
28
The Institute for Language and Folklore: Publications (DiVA)
28
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences)
26
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