Content Provider
Cambridge University Press
456
David Rumsey Historical Map Collection (Cartography Associates)
260
Oxford University Press (via Crossref)
221
JSTOR
207
Biodiversity Heritage Library (BHL)
202
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
192
Springer Nature
185
Informa (via Crossref)
168
RePEc (Research Papers in Economics)
154
Springer Nature (via Crossref)
153
De Gruyter
133
Unknown
119
OECD iLibrary (via Crossref)
118
Texas A&M University Galveston Campus: DSpace Repository
116
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
101
Brill
100
DataCite Metadata Store (German National Library of Science and Technology)
91
Johns Hopkins University Press
88
JSTOR (via Crossref)
81
Oxford University Press
79
Wiley Online Library (via Crossref)
75
The National Academies Press (via Crossref)
62
University of Toronto Press (U Toronto Press - via Crossref)
61
OLAC: Open Language Archives Community
30
Informa
29
Digitale Sammlungen der Herzogin Anna Amalia Bibliothek Weimar (HAAB)
28
Wiley Online Library
28
De Gruyter (via Crossref)
27
University of Otago: OUR Heritage (Otage University Research)
25
Frontiers (Publisher)
23
ScienceDirect (Elsevier - via Crossref)
21
Digitale Bibliothek Mecklenburg-Vorpommern (Greifswald University)
20
E-resource repository of the University of Latvia
20
GDZ - Center for Retrospective Digitization, Göttingen (Georg-August-Universität Götingen)
20
LeibnizOpen (The Leibniz Association)
20
The University of Warwick: WRAP - Warwick Research Archive Portal
20
Zenodo
20
University of East Anglia: UEA Digital Repository
19
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
17
SAGE Publications (via Crossref)
17
Kiel University Library: Digital Collections
16
University of Southampton: e-Prints Soton
16
Australian National University: ANU Digital Collections
15
The State Library of Massachusetts: Electronic Repository
15
Galiciana: Biblioteca Dixital de Galicia (Digital Library of Galicia)
14
James Cook University, Australia: ResearchOnline@JCU
14
ScienceDirect (Elsevier)
14
The digital State Library of Upper Austria (oö)
14
Aarhus University: Research
13
Duke University Press
13
more ...