Content Provider
University of Alaska: ScholarWorks@UA
116
DataCite Metadata Store (German National Library of Science and Technology)
26
Washington State University: WSU Libraries Digital Collections
19
Defense Technical Information Center: DTIC Technical Reports database
3
Hathi Trust Digital Library
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
1
SAGE Publications (via Crossref)
1
Wiley Online Library (via Crossref)
1