Wallen, Norman E. Educational research a guide to the process Norman E. Wallen. - Experimental ed. - Belmont, Calif. Wadsworth Pub. Co. 1974. - xii, 250 p. - Wadsworth series in curriculum and instruction . Includes bibliographies and index. ISBN: 053400346X LCCN: 73094232 Subjects--Topical Terms: Education--Research.