Moroney, M.J.. <br/><br/>
Facts from Figures /  

 - Reprinted 1973 /  
 - England :   Penguin Books Ltd. ,   1960 
 - p.473 :  
<br/><br/><label>ISBN: </label>0-14-02.0236-6 
<br/><br/><label>Dewey Class. No.: </label>XObB28  / J3