Content Provider
WikiBooks - Open-content textbooks
11
Cambridge University Press
5
Australian National University: ANU Digital Collections
4
Biodiversity Heritage Library (BHL)
4
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
2
Ohio State University (OSU): Knowledge Bank
2
UNESDOC - UNESCO Digital Library
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
1
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
1
ORA - Oxford University Research Archive
1
Research UNE - University of New England at Armidale, NSW Australia
1
The University of Queensland: UQ eSpace
1
e-rara.ch (ETH Zürich)
1