Beek, Howard Vander. <br/><br/>
Concept and statment. 

 - 1st Ed. 
 - Glenview :   Scott, Foresman,   1974. 
 - 566 p. 
<br/><br/><label>ISBN: </label>067333422 
<br/><br/><label>Dewey Class. No.: </label>423  / BEE