171 常磐炭田の白坂層から産した貝化石
171 Molluscan fossils from the Shirasaka Formation in the Joban Coalfield

Sakae O'hara, Shoichi Arisaka, Nagayuki Nemoto
1990 Annual Meeting of the Geological Society of Japan  
doi:10.14863/geosocabst.1990.0_306 fatcat:jvtctfqpdngqhp7l5w6dsfakia