@book{68636,
	author = {Perman, Roger and Ma, Yue},
	title = {Natural Resource and Environmental Economics /},
	publisher = {Pearson Addison Wesley,},
	year = {2011.},
	address = {Harlow, Essex ;},
	edition = {4th ed.},
	url = {http://10.10.170.122:8080/browse/book/25915}
}