Lehmann, Irvin J., Educational research; readings in focus, edited by Irvin J. Lehmann [and] William A. Mehrens. - New York, Holt, Rinehart and Winston [1971] - xiii, 460 p. illus. 23 cm. Includes bibliographies. ISBN: 0030831407 LCCN: 72142106 Subjects--Topical Terms: Education--Research. LC Class. No.: LB1028 / LEH 1971 Dewey Class. No.: 370/.78