Content Provider
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
241
Biodiversity Heritage Library (BHL)
87
epub.oeaw (The digital publication portal of the Austrian Academy of Sciences)
8
Publication Server of the Justus-Liebig-University of Giessen
4
Directory of Open Access Journals: DOAJ Journals
3
University of St. Gallen: Research Platform Alexandria
2
AMAD - "Archivum Medii Aevi Digitale - Specialized open access repository for research in the middle ages"
1
BBC - Bałtycka Digital Library (Poland)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Heidelberg University Library: Heidelberg historic literature - digitized
1
Henry - Hydraulic Engineering Repository
1
OpenAgrar (OA)
1
REPOSIT HAW Hamburg
1
Staatsbibliothek zu Berlin: Digitised Collections
1
TUHH Open Research (TORE - Technische Universität Hamburg)
1