Encyclopedia of educational research : A project of the American Educational Research Association / Ed. : Robert L. Ebel ; Associate ed.: Victor H. Noll, Editorial assistant : Roger M. Bauer. - 4th ed. - London : Macmillan, 1969. - xliv, 1522 p. Index (p.xxxi - xliv) bound in between p. 770-771 Includes bibliogr. Subjects--Topical Terms: Education--DictionariesEducation--Bibliography