Content Provider
Directory of Open Access Journals: DOAJ Articles
140
DataCite Metadata Store (German National Library of Science and Technology)
61
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
9
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
8
Max Planck Society: MPG.PuRe
3
The Portal to Texas History (University of North Texas)
3
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
3
WikiBooks - Open-content textbooks
3
Biodiversity Heritage Library (BHL)
2
GettDigital (Gettysburg College Digital Collections)
2
The Library of Congress: American Memory
2
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
1
Directory of Open Access Journals: DOAJ Journals
1
Freie Universität Berlin: Refubium (FU Berlin)
1
GEO-LEOe-docs (FID GEO)
1
HASP Journals (Heidelberg Asian Studies Publishing)
1
Harvard University: Harvard Collections
1
Hathi Trust Digital Library
1
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
1
MACAU: Open Access Repository of Kiel University
1
MIUSE - Mie University Scholarly E-collection
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Münster University (WWU): miami
1
OPARU (OPen Access Repository of Ulm University)
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
Publication Server of Goethe University Frankfurt am Main
1
Universität Leipzig: Qucosa
1
Unknown
1