@book{136848,
	author = {Savidge, J.L. and American Gas Association, AGA. Transmission Measurement Comittee and Savidge, J.L. and American Petroleum Institute, API},
	title = {Compressibility factors of natural gas and other related hydrocarbon gases},
	publisher = {American Gas Association, AGA},
	year = {1994},
	address = {Arlington},
	edition = {2da. ed.},
	note = {Norma correspondiente a API MPMS 14.2.}
}