Warner, Ruby Hernlund. The child and his elementary school world. - Englewood Cliffs, N.J. Prentice-Hall 1957. - 406 p. illus. 22 cm. - Prentice-Hall education series . LCCN: 57010928 /L Subjects--Topical Terms: Education , Elementary LC Class. No.: LB1555 / .W28 Dewey Class. No.: 372