Duffy, P <br/><br/>
Variations 

 - New Delhi  :  Prentice Hall Publication,  1986. 
 - x,229 
<br/><br/><label>ISBN: </label>0-13-940503-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General 
<br/><br/><label>Dewey Class. No.: </label>428  / DUF