@book{276,
	author = {Head, George O., and Pietra, Charles A.},
	title = {The AutoCAD 3D book /},
	publisher = {Galgotia Publications ;},
	year = {c1989 [Reprinted 1990].},
	address = {New Delhi :},
	edition = {1st ed.},
	note = {Includes index.}
}