@book{1821,
	author = {Bhatt, N. D. and Panchal, V. M.},
	title = {Problems & solutions in elementary engineering drawing (Plane and solid geometry) (In first-angle projection method) /},
	publisher = {Charotar Media Pvt. Ltd.,},
	year = {1999.},
	address = {Gujrat:},
	edition = {40th ed.}
}