Maohong, B. (2018). Environmental History and World History. Cherepovets State University.
Chicago-čujuhus (17. p.)Maohong, Bao. Environmental History and World History. Cherepovets State University, 2018.
MLA-čujuhus (9. p.)Maohong, Bao. Environmental History and World History. Cherepovets State University, 2018.
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