Jacobson, Paul B. <br/><br/>
Effective Schhol Principal 
Paul B. Jacobson 
 -  Prentice Hall Inc.  1963 
 - 532p.  23 cm.  
<br/><br/><label>ISBN: </label> 39.37 
<br/><br/><label>Dewey Class. No.: </label>020  / JAC-EF