Não informado. (1921). Contribution from the Institute of Geology and Paleontology. Tohoku University.
Style de citation Chicago (17e éd.)Não informado. Contribution from the Institute of Geology and Paleontology. Sendai, Japão: Tohoku University, 1921.
Style de citation MLA (8e éd.)Não informado. Contribution from the Institute of Geology and Paleontology. Tohoku University, 1921.
Attention : ces citations peuvent ne pas être correctes à 100%.