Content Provider
Oklahoma State University: Digital Collections @ OKSTATE Library
27
DataCite Metadata Store (German National Library of Science and Technology)
16
Cambridge University Press
15
Cambridge University Press (via Crossref)
12
Unknown
11
UTSA Digital Collections (The University of Texas at San Antonio)
10
The University of Utah: J. Willard Marriott Digital Library
8
Directory of Open Access Journals: DOAJ Articles
7
University of Calgary Journal Hosting
7
Wiley Online Library
7
Hunter Library Digital Collections (Western Carolina University)
6
WikiBooks - Open-content textbooks
6
ARPI - Archivio della Ricerca dell'Università di Pisa
3
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Digital Repository of Scientific Institutes (RCIN)
3
Geological Quarterly
3
North Dakota State University (NDSU): Digital Horizons
3
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
3
The Royal Society
3
Università degli Studi di Ferrara: CINECA IRIS
3
Wiley Online Library (via Crossref)
3
Aarhus University: OJS at The State and University Library
2
Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech
2
Hathi Trust Digital Library
2
LillOA (HAL Lille Open Archive, Université de Lille)
2
LillOA (Lille Open Archive - Université de Lille)
2
Lund University Publications (LUP)
2
Muséum National d'Histoire Naturelle (MNHM): HAL
2
PubMed Central (PMC)
2
Tidsskrift.dk (The Royal Library, Denmark)
2
University of Groningen research database
2
University of Lethbridge Digitized Collections
2
University of the Pacific, McGeorge School of Law: Scholarly Commons
2
University of the Pacific: Scholarly Commons
2
Université de Nantes: HAL-UNIV-NANTES
2
Université de Perpignan: HAL
2
Washington State University: WSU Libraries Digital Collections
2
Érudit.org (Université Montréal)
2
ADDI: Repositorio Institucional de la Universidad del País Vasco (UPV)
1
Archaeology, Ethnology & Anthropology of Eurasia (E-Journal)
1
Archives ouvertes de Paris-Saclay
1
Arheologia (E-Journal)
1
Carroll College: Carroll Scholars
1
Digital Commons University of South Florida (USF)
1
Federation of Finnish Learned Societies: Scientific Journals Online
1
Florida State University Digital Library (FSUDL)
1
Florida State University: DigiNole Commons
1
Gallica - bibliothèque numérique de la Bibliothèque nationale de France (BnF)
1
Grand Valley State University: GVSU Digital Collections
1
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
1
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