@book{56101,
	author = {Starling, K.E. and American Gas Association, AGA and Starling, K.E. and American Gas Association, AGA},
	title = {Compressibility factors of natural gas and other related hydrocarbon gases :},
	publisher = {American Gas Association, AGA,},
	year = {1994.},
	address = {Arlington :},
	edition = {2da. ed.}
}