Hyde, Margaret O. 1917- This crowded planet. Illus. by Mildred Waltrip. - New York, Whittlesey [1961] - 159 p. illus. 21 cm. LCCN: 61015315 Subjects--Topical Terms: Population--Juvenile literature.Natural resources--Juvenile literature. LC Class. No.: HB883 / .H9 Dewey Class. No.: 304.2 / HYT 1961