Spears, Harold <br/><br/>
Improving the supervision of instruction / 
by Harold Spears 
 - America :  Prentice hall,,  1953. 
 - 478p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Supervision
<br/><br/><label>Dewey Class. No.: </label>371.2  / SPE.I