Igo, H.; Adachi, S. (1981). Foraminiferal biostratigraphy of the Ichinotani Formation (Carboniferous-Permian), Rida Massif, Central Japan. Part 1 - Sorne foraminifers from the upper part of the Lower Member of the Ichinotani Formation. Sc. Rep. lnst. Geosc., Univ. Tsukuba, Sect. B. 2: 101-118.
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Igo, H.; Adachi, S.
1981
Foraminiferal biostratigraphy of the Ichinotani Formation (Carboniferous-Permian), Rida Massif, Central Japan. Part 1 - Sorne foraminifers from the upper part of the Lower Member of the Ichinotani Formation.