McWeeny, Roy. <br/><br/>
Coulson's valence   
by Roy McWeeny 
 - 3rd ed. 
 - Oxford  Oxford University Press  1979 
 - x, 434p. 
<br/><br/><label>ISBN: </label>0 19 4423522 
<br/><br/><label>Dewey Class. No.: </label>541.224  / N791 (IPC-I143)