@book{45137,
	author = {Jensen, Cecil Howard and Helsel, Jay D.},
	title = {Interpreting engineering drawings /},
	publisher = {Thomson/Delmar Learning,},
	year = {c2007},
	address = {Clifton Park, NY :},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0613/2006014643.html}
}