Brian C. Benton Mastering AutoCAD 2021 and AutoCAD LT 2021 / Brian C. Benton and George Omura - Indianapolis, Indiana : John Wiley & Sons, c2021. - xxxiii, 1078 pages : illustration. ; 23 cm. Includes appendices and index. ISBN: 978-1-119-71535-1 Subjects--Topical Terms: AUTOCAD.COMPUTER GRAPHICS.COMPUTER-AIDED DESIGN. LC Class. No.: T 385 B46 2021