@book{137023,
	author = {Lemoff, Theodore C. and National Fire Protection Association and Lemoff, Theodore C. and International Approval Services},
	title = {National fuel gas code handbook},
	publisher = {National Fire Protection Association},
	year = {1997},
	address = {Quincy},
	edition = {3 rd. ed.},
	note = {Basado en la edición de 1996 de las normas ANSI Z223.1/NFPA 54, National Fuel Gas Code.}
}