Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
23
GEO-LEOe-docs (FID GEO)
5
DBGPrints-Archive (German Soil Science Society)
4
Directory of Open Access Journals: DOAJ Articles
4
WikiBooks - Open-content textbooks
3
Frankfurt/Main University Library: Digitale Sammlungen
2
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
German Aerospace Center: elib - DLR electronic library
2
ZHAW digitalcollection (Repository of the Zurich University of Applied Sciences)
2
BOKU:ePUB (Publikationsserver der Universitätsbibliothek Bodenkultur Wien)
1
Cologne University: KUPS
1
DORA Empa
1
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
1
Eberhard Karls University Tübingen: Publication System
1
Georg-August-Universität Göttingen: GOEDOC
1
Georg-August-Universität Göttingen: eDiss
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Münster University (WWU): miami
1
OPUS FAU - Online publication system of Friedrich-Alexander-Universität Erlangen-Nürnberg
1
Organic Eprints (Danish Research Centre for Organic Farming, DARCOF)
1
Publication Server of Goethe University Frankfurt am Main
1
REPOSIT HAW Hamburg
1
Saxon State Library - State and University Library Dresden (SLUB): Qucosa
1
ScienceDirect (Elsevier)
1
University of Innsbruck: Digital Library (Universitäts- und Landesbibliothek Tirol)
1
University of Technology Bergakademie Freiberg: Qucosa
1
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
1
Unknown
1
da|ra - Registration agency for social and economic data
1