Head, George O  <br/><br/>
1000 autocad tips & tricks / George O. Head & Jan Doster Head.-3rd ed. 

 - Chapel Hill, NC : Ventana Press, C1993. 
 - xlix, 686 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>1566040078 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Systems engineering-mathematical models
<br/><br/><label>Dewey Class. No.: </label>620.0042 HEA