@book{2769,
	author = {Dhawan, R. K.},
	title = {Textbook of machine drawings },
	publisher = {S Chand & Co Ltd,},
	year = {1998.},
	address = {New Delhi},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/8121908248/chopaconline-20}
}