@book{12785,
	author = {Pennington, Ralph H.},
	title = {Introductory computer methods and numerical analysis /},
	publisher = {Collier Macmillan Ltd,},
	year = {1970.},
	address = {[S.l.] :},
	edition = {2nd Revised edition.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0023938307/chopaconline-20}
}