I.  Hayami, ?Liassic Gervillia and Isognomon in Japan (Studies on the Liassic pelecypods in Japan, 2)?, Japanese Journal of Geology and Geography, vol. 28, pp. 97-106, 1957.

I.  Hayami, ?Liassic Gervillia and Isognomon in Japan (Studies on the Liassic pelecypods in Japan, 2)?, Japanese Journal of Geology and Geography, vol. 28, pp. 97-106, 1957.