Não informado. (1921). Contribution from the Institute of Geology and Paleontology. Tohoku University.
Chicagoスタイル(17版)引用形式Não informado. Contribution from the Institute of Geology and Paleontology. Sendai, Japão: Tohoku University, 1921.
MLA(8版)引用形式Não informado. Contribution from the Institute of Geology and Paleontology. Tohoku University, 1921.
警告: この引用は必ずしも正確ではありません.