Content Provider
da|ra - Registration agency for social and economic data
59
Directory of Open Access Journals: DOAJ Articles
38
DataCite Metadata Store (German National Library of Science and Technology)
32
Ike Skelton Combined Arms Research Library (CARL) Digital Library
26
Unknown
19
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
11
German Aerospace Center: elib - DLR electronic library
9
UNESDOC - UNESCO Digital Library
9
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
8
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
7
Biodiversity Heritage Library (BHL)
6
Digital Repository of Scientific Institutes (RCIN)
5
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
4
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
4
MACAU: Open Access Repository of Kiel University
3
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
3
AMUR - Adam Mickiewicz University Repository, Poznan
2
Center for Jewish History: Digital Collections
2
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
2
Publication Server of Goethe University Frankfurt am Main
2
Adam Mickiewicz University in Poznań: PRESSto
1
BOP Serials (Bern Open Publishing, University of Bern)
1
BORIS (Bern Open Repository and Information System, University of Bern)
1
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
1
Directory of Open Access Books (DOAB)
1
Doria (National Library of Finland)
1
ETH Zürich Research Collection
1
Eldorado - Repositorium der TU Dortmund
1
GMS - German Medical Science
1
Georg-August-Universität Göttingen: GOEDOC
1
Georg-August-Universität Göttingen: eDiss
1
Hathi Trust Digital Library
1
JKI Open Journal Systems (Julius Kühn-Institut)
1
JYX - Jyväskylä University Digital Archive
1
Masaryk University Journals
1
Munich Personal RePEc Archive (MPRA - Ludwig-Maximilians-University Munich)
1
OAPEN (Open Access Publishing in European Networks)
1
Open Research Library
1
Organic Eprints (Danish Research Centre for Organic Farming, DARCOF)
1
REPOSIT HAW Hamburg
1
University of Innsbruck: Digital Library (Universitäts- und Landesbibliothek Tirol)
1
University of San Diego: Digital@USanDiego
1
University of St Andrews: Research Portal
1
University of St. Gallen: Research Platform Alexandria
1
University of Technology Bergakademie Freiberg: Qucosa
1
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
1
University of the Highlands and Islands: Research Database of UHI
1
Universität Wien: OJS-Service
1
pedocs document server (German Education Portal/DIPF)
1