Content Provider
WikiBooks - Open-content textbooks
9
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
7
David Rumsey Historical Map Collection (Cartography Associates)
3
Biodiversity Heritage Library (BHL)
2
University of the Highlands and Islands: Research Database of UHI
2
Cambridge University Press (via Crossref)
1
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
1
Marine Institute Open Access Repository
1
Monash University: Figshare
1
University of Cambridge, Department of Earth Sciences: ESC Publications
1
University of St Andrews: Research Portal
1