Callahan, Joseph F. Teaching In The Middle And Secondary Schools : Planning For Competency / Joseph F. Challahan, Leonard H. Clark - Third edition. - New york : Macmillan Publishing Company, 1977. - 532 Pages : pbk. 24 cm. Includes Index. ISBN: 0-02-946039-5 Subjects--Topical Terms: Education Dewey Class. No.: 373.11 / CAL