Não informado. (1912). Science reports of the Tohoku University. Tohoku University, Faculty of Science, Institute of Geology and Paleontology.
Chicago-referens (17:e uppl.)Não informado. Science Reports of the Tohoku University. Sendai, Japão: Tohoku University, Faculty of Science, Institute of Geology and Paleontology, 1912.
MLA-referens (8:e uppl.)Não informado. Science Reports of the Tohoku University. Tohoku University, Faculty of Science, Institute of Geology and Paleontology, 1912.
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