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Notes on "Lewesiceras" and "Nowakites" (Pachydiscid Ammonites) from the Cretaceous of Hokkaido

Tatsuro Matsumoto

出版	Palaeontological Society of Japan, 1979
URL	http://books.google.com.hk/books?id=x9r4rQEACAAJ&hl=&source=gbs_api