@book{6780,
	author = {Beer, Ferdinand. and Johnston, Jr., E. Russell.},
	title = {Vector mechanics for engineers :},
	publisher = {McGraw-Hill Science/Engineering/Math,},
	year = {1977.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/0077295498/chopaconline-20}
}