CENTRO DE INFORMACIÓN GEO-BIOLÓGICO DEL NOA

Multinodose Seaphitid Cephalopods from the Lower Part of the Pierre Shale and equivalent Rocks in the Conterminous United States.

Cobban;William A.

Multinodose Seaphitid Cephalopods from the Lower Part of the Pierre Shale and equivalent Rocks in the Conterminous United States. - Washington : United States Government Printing Office, 1964.