Spears Harold <br/><br/>
Improving the supervision of instruction 

 - New York, USA  Prentice - Hall, Inc   1955 
 - xii,478p 
 - Prentice - Hall education series .
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School Administration