Mackenzie, Gordon Noth <br/><br/>
Instructional leadership 
by Gordon N. Mackenzie and Stephen M. Corey 
 - New York  Columbia University  1954 
 - 209p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School superintendents and principals
<br/><br/><label>Dewey Class. No.: </label>P11 M199