@book{66408,
	author = {National Geographic Learning (Firm)},
	title = {Sustainability /},
	publisher = {Delmar Cengage Learning,},
	year = {2013},
	series = {National Geographic Learning reader},
	address = {Clifton Park, NY :},
	note = {Access code: To register, go to www.cengagebrain.com [PP9HKWSP5NM6VP]}
}