@book{239981,
	author = {United Nations},
	title = {Report of the preparatory committee for the United Nations conference on environment and development  ; vol.1 /},
	publisher = {United Nations,},
	year = {1991.},
	address = {New York :},
	note = {"General assembly official records : Forty-fifth session supplement no. 48 (A/46/48)"
}
}