McClurg, James E. Caves and their mysteries. [electronic resource] Illustrated by Norman Kenyon. - Racine, Wis., Whitman Pub. Co. [1962] - 58 p. illus. 22 cm. - A Whitman learn about book, 12 . LCCN: 62010619 Subjects--Topical Terms: Caves--Juvenile literature. LC Class. No.: PZ10.M116 / Cav