Tsubokawa, R. ; Bolland, R. F. (1991). Berthella martensi (Pilsbry,1896), New to the Japanese Notaspidea Fauna. VENUS (The Japanese Journals of Malacology). 50(3):I84-195.
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Tsubokawa, R. ; Bolland, R. F.
1991
Berthella martensi (Pilsbry,1896), New to the Japanese Notaspidea Fauna.