Barr, A S <br/><br/>
Supervision 

 - New York  Appleton-Century - Crofts  1947 
 - 879p 
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label> 0 
<br/><br/><label>Dewey Class. No.: </label>P63  / B270