Shells and shelling; : [the complete family guide to collecting and identification: Florida, Gulf, and Caribbean] [electronic resource] / Produced under the editorship of Ralph Barrett [and] David Patterson. Technical assistance by the Shell Factory, Fort Myers, Fla.. — [Miami, Fla., : Post Publications,, 1967]. — 64 p. : illus. (part col.) 23 cm. — (Post Publications guides to Florida and the Caribbean).