Gamma,Erich..[et al.] <br/><br/>
Design patterns  elements of reusable object-oriented software 

 - New Delhi  Pearson education  1995-R2009 
 - xv,395p.  24cm.  PB 
<br/><br/><label>ISBN: </label>9788131700075 
<br/><br/><label>Dewey Class. No.: </label>005.12  / GAM