Content Provider
Directory of Open Access Journals: DOAJ Articles
52
Unknown
40
Biodiversity Heritage Library (BHL)
20
Cologne University: KUPS
8
Bayreuth University: EPub Bayreuth
5
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
4
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
2
Universität Leipzig: Qucosa
2
FWF-E-Book-Library (Austrian Science Fund) / Fonds zur Förderung der wissenschaftlichen Forschung
1
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
1
Georg-August-Universität Göttingen: GOEDOC
1
UNESDOC - UNESCO Digital Library
1
University of St. Gallen: Research Platform Alexandria
1
University of Vienna: Phaidra
1