Smith, Wilma F. Instructional leadership how principals make a difference Wilma F. Smith, Richard L. Andrews. - Alexandria, Va. Association for Supervision and Curriculum Development c1989. - viii, 155 p. ill. 23 cm. Includes bibliographical references (p. 129-134). LCCN: 89037232 Subjects--Topical Terms: School principalsLeadership LC Class. No.: LB2831.9 / .S64 1989 Dewey Class. No.: 371.2/012