@book{550431,
	author = {Tuma, Jan J. and Walsh, Ronald A.},
	title = {Engineering mathematics handbook /},
	publisher = {McGraw-Hill,},
	year = {c1998.},
	address = {New York :},
	edition = {4th ed.},
	url = {http://www.loc.gov/catdir/toc/mh022/97034589.html}
}