Content Provider
The Portal to Texas History (University of North Texas)
10
Digital.CSIC (Spanish National Research Council)
6
The University of Texas at Austin: Texas ScholarWorks
5
DataCite Metadata Store (German National Library of Science and Technology)
4
Universiti Putra Malaysia: PSAS (Perpuskataan Sultan Abuld Samad) Institutional Repository
3
Zenodo
3
Oklahoma State University: Digital Collections @ OKSTATE Library
2
Repositorio Digital Conicyt RI 2.0 (Comisión Nacional de Investigación Científica y Tecnológica)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Creighton University: Creighton Digital Repository (CDR)
1
National Cheng Kung University: NCKU Institutional Repository
1
National Chung Hsing University Institutional Repository - NCHUIR
1
Normandie Université: HAL
1
Repository of Brest State Technical University
1
Universidade of Minho: RepositóriUM
1
University of Glasgow: Enlighten - Publications
1
University of North Texas: UNT Digital Library
1
University of Oklahoma/Oklahoma State University: SHAREOK Repository
1
Ural Federal University (URFU): ELAR
1
VTT's Research Information Portal
1
eaDNURT (Electronic Archiv of Dnepropetrowsk National University of Railway Transport)
1