Content Provider
Biodiversity Heritage Library (BHL)
74
WikiBooks - Open-content textbooks
32
Arca (BC's Digital Treasures)
7
Unknown
7
UNBC's Digital Institutional Repository (University of Northern British Columbia)
4
Australian National University: ANU Digital Collections
2
Texas A&M University Digital Repository
2
University of Alaska: ScholarWorks@UA
2
Aalborg University's Research Portal
1
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
1
Ohio State University (OSU): Knowledge Bank
1
Publication Server of Goethe University Frankfurt am Main
1
Research Institute for Humanity and Nature Repository
1
TRUSpace - Thompson Rivers University
1
UArctic Library
1
UMSL Digital Library (University of Missouri-St. Louis)
1
University College London: UCL Discovery
1
University of Copenhagen: Research
1
University of Vienna: Phaidra
1