Omura,George <br/><br/>
Mastering autocad release 12 

 - New Delhi  BPB pub.  1994 
 - 1142p. 
<br/><br/><label>ISBN: </label>81-7029-254-9 
<br/><br/><label>Dewey Class. No.: </label>006.66   Omu.N4