@book{1047,
	author = {Cooper, Charles, and United Nations Environment Programme.},
	title = {Economic evaluation and the environment :},
	publisher = {Hodder and Stoughton,},
	year = {1981.},
	address = {London :},
	note = {"Sponsored by the United Nations Environment Programme under a programme of conceptual and methodological studies in the field of environment and development."}
}