Cobban W.A., - Some Middle Cenomanian (Upper Cretaceous) Acanthoceratid Ammonites from the Western Interior of the United States- In folio, broch1987. , pp. 60 with 13 pls. with facing captions, and 19 figs. Geological Survey Professional Paper 1445. EUR 14.00 [Appr.: US$ 15.84 | £UK 12 | JP¥ 2299] Book number 76117is offered by:
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