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

 - 2nd ed. 
 - London  English language Book Society.  1977 
 - xv, 428 p. 
<br/><br/><label>ISBN: </label> POU1.55 
<br/><br/><label>Dewey Class. No.: </label>541.224 M967V