Content Provider
Cambridge University Press
18
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
5
Unknown
5
Oxford University Press
4
Oxford University Press (via Crossref)
4
Biodiversity Heritage Library (BHL)
2
DataCite Metadata Store (German National Library of Science and Technology)
2
De Gruyter
2
RePEc (Research Papers in Economics)
2
School of Oriental and African Studies, University of London: SOAS Research Online
2
The University of Warwick: WRAP - Warwick Research Archive Portal
2
Biblioteca Virtual del Patrimonio Bibliográfico
1
Cornell University Press
1
Digitale Bibliothek Mecklenburg-Vorpommern (Greifswald University)
1
E-resource repository of the University of Latvia
1
JSTOR (via Crossref)
1
James Cook University, Australia: ResearchOnline@JCU
1
MTAK: REAL (Library and Information Centre of the Hungarian Academy of Sciences
1
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
1
Open Book Publishers (via CrossRef)
1
The Open University: Open Research Online (ORO)
1
UI Press - University of Illinois Press
1
University College London: UCL Discovery
1
University of Alaska: ScholarWorks@UA
1
University of East Anglia: UEA Digital Repository
1
Zenodo
1
transcript Verlag
1