@book{166011,
	author = {American Gas Association, AGA},
	title = {Guidelines for using high differential pressures for measuring natural gas with orifice meters},
	publisher = {American Gas Association, AGA},
	year = {1999},
	address = {Washington},
	note = {Este documento es usado en forma conjunta con el AGA report no. 3 "Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids".}
}