@book{2791,
	author = {Wirshing, Roy. and Wirshing, James.},
	title = {Schaum's outline of introductory surveying /},
	publisher = {McGraw-Hill,},
	year = {1985.},
	series = {Schaum's.},
	address = {[S.l.] :},
	edition = {1st ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0070711240/chopaconline-20}
}