Spriegel, William R., Schulz, Edward and Spriegel, William B. <br/><br/>
Elements of supervision 

 - 2nd ed. 
 - New York  ; John Wiley & Sons  , 1957 
 - xii,349p. 
<br/><br/><label>ISBN: </label> 22.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Supervision
<br/><br/><label>Dewey Class. No.: </label>370  / SPR