Onstott, Scott AutoCAD 2013 and AutoCAD LT 2013 essentials : AutoDesk official training guide / Scott Onstott.. - Indianapolis, Ind. John Wiley & Sons 2012. - xviii, 382p ill 24cm ISBN: 9781118244814 Subjects--Topical Terms: Computer graphics Dewey Class. No.: 006.68 ONS 2012