Não informado. (1961). Journal of the Mining College, Akita University. Akita Daigaku Kozangakubu.
Chicago-viite (17. p.)Não informado. Journal of the Mining College, Akita University. Akita, Japão: Akita Daigaku Kozangakubu, 1961.
MLA-viite (8. p.)Não informado. Journal of the Mining College, Akita University. Akita Daigaku Kozangakubu, 1961.
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