@book{143548,
	author = {American Petroleum Institute, API},
	title = {Compact steel gate valves extended body},
	publisher = {American Petroleum Institute, API},
	year = {1989},
	address = {Washington},
	edition = {3rd ed.},
	note = {En lista de out of print en catálogo 2003 (DADA DE BAJA)}
}