Rogers, J.E. The shell book - Charles T.branford publishers Boston 1936 - 503p. - Gasteopoda Scaphopoda Pelecypoda Cephalopoda Seashells Marine Resources Nat. Bib. No.: 5823 Nat. Bib. Agency Control No.: 594.1 ROG Subjects--Topical Terms: Biological Sciences Universal Decimal Class. No.: 594.1 1