Liewellyn, Rick.  <br/><br/>
Inside autocad 13 for dos / 

 - New Delhi,   Prentice Hall of India,   c1996. 
 - xxvii, 1554p. ;  ill. ;  24 cm.  
<br/><br/><label>ISBN: </label>8120310837 
<br/><br/><label>LC Class. No.: </label>3182 
<br/><br/><label>Dewey Class. No.: </label>620.00420285536