Beach, Don M. <br/><br/>
Supervision : Focus on instruction / 
Don M. Beach 
 - New York :  Harper & Row, Publishers,  1989 
 - 294 p. :  ill. 
<br/><br/><label>ISBN: </label>0060405589 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School supervision--United States.
<br/><br/><label>LC Class. No.: </label>LB2806.4  / B43