東北日本の古生代こけむし化石について(紹介)
On the Paleozoic Bryozoa of Northeast Japan (Introduction)

Sumio Sakagami
1988 Earth Science (Chikyu Kagaku)  
doi:10.15080/agcjchikyukagaku.42.4_237 fatcat:fnub6ewxl5fldfjxypr35mh7bu