Gamma, Erich; Gamma, Erich; Helm, Richard; Johnson, Ralph E., 1955- <br/><br/>
Design patterns 

 - USA  Addission Wesley  1977 
 - xiii,395p 
<br/><br/><label>ISBN: </label> RS 4949.18 
<br/><br/><label>Dewey Class. No.: </label>005.12