Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
69
Defense Technical Information Center: DTIC Technical Reports database
10
Directory of Open Access Journals: DOAJ Articles
7
Unknown
6
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Ohio State University (OSU): Knowledge Bank
3
University of California: eScholarship
3
University of Lincoln: Lincoln Repository
2
Vrije Universiteit Amsterdam (VU): Research Portal
2
Aarhus University: Research
1
Canadian Science Publishing
1
Copernicus Publications: E-Journals
1
Lund University Publications (LUP)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
The University of Brighton Research Portal
1
Universidad de Costa Rica: Repositorio Kérwá
1