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Jurassic (Bathonian Or Early Callovian) Ammonites from Alaska and Montana

Ralph Willard Imlay

出版	U.S. Government Printing Office, 1962
URL	http://books.google.com.hk/books?id=k9nEApjZiZMC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Descriptions and illustrations of cephalopods of possible late Middel Jurassic (Bathonian) age.