Sohl, Norman F. 1924- Marine Jurassic gastropods, Central and Southern Utah / by Norman F. Sohl. -- Washington : United States Government Printing Office, 1965 - 29 p., [5] h. de lam. -- (Geological Survey Professional Paper ; 503-D). Subjects--Topical Terms: Gasterópodos fósilesJurásicoUtah Universal Decimal Class. No.: 564.3(792)"6152"