Author: Hirayama, K., 1955.:
Title: The Asagain Formation and its molluscan fossils in the Northern Region, Jôban Coal-field, Fukushima Prefecture, Japan.
Description: Sci. Rep. Tokyo Kyoiku Daigaku, Sect. C, 4(28): pp. 49-130,[10], 131 photos on 5 pls., 5 figs. (2 fold.), tabs. (2 fold.), refs. New plain wrs. - Oligocene.

Keywords: