Gwynn, John Minor,  1897-. <br/><br/>
Theory and practice of supervision / 
by J. Minor Gwynn. 
 - New York :  Dodd & Mead,  1961. 
 - 473 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School supervision.