Murrell, J N. <br/><br/>
Valence theory 

 - 2nd ed 
 - New York  John Wiley & Sons LTD  1970 
 - xv, 428 p 
<br/><br/><label>ISBN: </label>471626880 
<br/><br/><label>Dewey Class. No.: </label>541.224