@book{182647,
	author = {Boersma, Tom; Boyce, Jim; Conner, Frank; Gesner, Rusty; Hester, Jeff.},
	title = {Inside autocad release 12.},
	publisher = {Prentice Hall of India PVt Ltd},
	year = {1993},
	address = {New Delhi},
	edition = {1}
}