@book{12902,
	author = {Churchill, Ruel Vance.},
	title = {Operational mathematics /},
	publisher = {McGraw-Hill Companies,},
	year = {1971.},
	series = {Modern operational mathematics in engineering.},
	address = {[S.l.] :},
	edition = {3rd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070108706/chopaconline-20}
}