Content Provider
Jagiellonian University Repository
26
Geological Quarterly
20
Digital Repository of Scientific Institutes (RCIN)
11
Unknown
11
Directory of Open Access Journals: DOAJ Articles
7
Portal Czasopism Naukowych (E-Journals)
4
Silesian University of Technology: Repolis
4
MCS University Digital Library
3
The Repository of the University of Silesia (RE-BUŚ)
3
Czasopisma UKSW (Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie)
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Jagiellonian University: Jagiellonian Digital Library
1
University of Lodz Repository (RUŁ)
1
University of Rzeszów (UR): Repository
1