@book{177,
	author = {Perman, Roger,},
	title = {Natural resource and environmental economics /},
	publisher = {Pearson Addison Wesley,},
	year = {c 2011.},
	address = {Harlow, Essex ;},
	edition = {4th ed.},
	note = {Prev. ed. entered under author: Perman, Roger, 1949-                                                                                                      

Includes index}
}