Bulla, Clyde Robert. What makes a shadow? / by Clyde Robert Bulla ; illustrated by June Otani. - Rev. ed. - New York, N.Y. : HarperCollins, c1994. - 32 p. : col. ill. ; 21 x 27 cm. - Let's-read-and-find-out science. Stage 1 . School Library Journal Booklist A simple explanation of how a shadow is formed. 2.2 K-2 ISBN: 0060229160 LCCN: 92036350 /AC Subjects--Topical Terms: Shadows. LC Class. No.: QC381.6 / .B84 1994 Dewey Class. No.: 535.4