Content Provider
Washington State University: WSU Libraries Digital Collections
42
North Dakota State University (NDSU): Digital Horizons
9
University of Alaska: ScholarWorks@UA
7
Cambridge University Press
2
Defense Technical Information Center: DTIC Technical Reports database
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Directory of Open Access Journals: DOAJ Articles
1
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
1
Informa (via Crossref)
1
Institut national des sciences de l'Univers: HAL-INSU
1
University of Calgary Journal Hosting
1
Université de Nantes: HAL-UNIV-NANTES
1
Unknown
1
White Rose eTheses Online (Universities Leeds, Sheffield, York)
1