YOUNG (Michael) and WILLMOTT (Peter). <br/><br/>
Symmetrical family. 

 - New York.  Pantheon Books, A Division of Random House.,  1973 
 - xxvii,398 
<br/><br/><label>ISBN: </label>0 394 48727 3 
<br/><br/><label>Dewey Class. No.: </label>306.8 YOUS