Content Provider
University of Michigan: Digital Collections
10
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
6
Memorial University of Newfoundland: Research Repository
6
Unknown
5
Borealis
2
PubMed Central (PMC)
2
ASM Journals (American Society for Microbiology)
1
Canadian Science Publishing (via Crossref)
1
DergiPark Akademik (E-Journals)
1
Directory of Open Access Journals: DOAJ Articles
1
North Dakota State University (NDSU): Digital Horizons
1
ScienceDirect (Elsevier - via Crossref)
1
ScienceDirect (Elsevier)
1
University of Houston Institutional Repository (UHIR)
1
University of New Brunswick: Centre for Digital Scholarship Journals
1
University of North Carolina: UNC Digital Collections
1
Wiley Online Library
1