DOAB Directory of Open Access Books
2021
DOAB Directory of Open Access Books
2018
ScienceDirect
2019
DOAB Directory of Open Access Books
2022
DOAB Directory of Open Access Books
2025
ScienceDirect
1962
ScienceDirect
1971
ScienceDirect
2025
ScienceDirect
2026
ScienceDirect
2023