Content Provider
University of Alaska: ScholarWorks@UA
127
Cambridge University Press
86
Defense Technical Information Center: DTIC Technical Reports database
16
DataCite Metadata Store (German National Library of Science and Technology)
3
Wiley Online Library (via Crossref)
3
Canadian Science Publishing (via Crossref)
2
Directory of Open Access Journals: DOAJ Articles
2
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
2
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
ScienceDirect (Elsevier - via Crossref)
1
Unknown
1