@book{136521,
	author = {Brown, Lester Russell and Brown, Lester Russell and Worldwatch Institute.},
	title = {La situación en el mundo 1991},
	publisher = {Editorial Sudamericana},
	year = {1991},
	series = {State of the World},
	address = {Buenos Aires},
	edition = {1st ed.},
	note = {Includes index.}
}