Benton, Brian C., <br/><br/>
Mastering AutoCAD 2021 and AutoCAD LT 2021 / 
Brian C. Benton, George Omura. 
 -  Sybex 
 - xxxiii, 1078 pages :  illustrations ;  24 cm 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781119715351 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AutoCAD.<br/>Computer graphics.<br/>Computer-aided design.