Content Provider
WikiBooks - Open-content textbooks
213
Repozytorium Uniwersytetu w Białymstoku (RUB)
18
Centre for Open Science: CeON Repository
10
Unknown
10
The Repository of the University of Silesia (RE-BUŚ)
6
University of Lodz Repository (RUŁ)
6
Lodz University of Technology Repository
2
Nicolaus Copernicus University (UMK) Torun: RUM@K
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
BBC - Bałtycka Digital Library (Poland)
1
Digital Library of the Faculty of Arts, Masaryk University
1
Institute of Slavic Studies, Polish Academy of Sciences: iReteslaw
1
Open Research Library
1
Saxon State Library - State and University Library Dresden (SLUB): Qucosa
1
UQAM - Université du Québec à Montréal: archipel
1
University of Bydgoszcz: UKW Repository
1
University of Luxembourg: ORBilu - Open Repository and Bibliography
1
Uniwersytet Zielonogórski: Zielonogórska Biblioteka Cyfrowa
1