@book{6098,
	author = {Perman, Roger  and Perman, Roger,},
	title = {Natural resource and environmental economics /},
	publisher = {Pearson Addison Wesley,},
	year = {2003.},
	address = {Harlow, England ;},
	edition = {3rd ed.},
	note = {Rev. ed. of: Natural resource and environmental economics / Roger Perman, Yue Ma, James McGilvray. 1996.}
}