DOAB Directory of Open Access Books
2022
MIT Press Direct to Open Backfile Complete Monographs
2005
ScienceDirect
1987
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
2021
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2021
DOAB Directory of Open Access Books
2012
OAPEN (Open Access Publishing in European Networks)
2020
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2020
DOAB Directory of Open Access Books
2020