Parramón, Mercè. The digestive system / Mercè Parramón ; illustrated by Marcel Socías. - New York : Chelsea House Publishers, c 1994. - 31 p. : ill. ; 27 cm. - The Invisible world. . Includes index. 314 314 ISBN: 0-7910-2126-2 Subjects--Topical Terms: Gastrointestinal system--Physiology--Juvenile literature.Digestive system. Dewey Class. No.: 612.3 / P247d