Lilly, Melinda Dirty and clean / Melinda Lilly - Vero Beach, Fla. : Rourke Pub., ©2004. - 24 pages : color illustrations ; 19 cm. - Read and Do Science. . ISBN: 1589526368 Subjects--Topical Terms: Hygiene. Dewey Class. No.: Circ. 613.4 L729 2004