Content Provider
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
4
DataCite Metadata Store (German National Library of Science and Technology)
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Digital Commons University of South Florida (USF)
1
Imperial College London: Spiral
1