@book{1247,
	author = {Cunningham, William P. and Cunningham, Mary Ann.},
	title = {Principles of environmental science :Inquiry and Applications},
	publisher = {McGraw-Hill Science/Engineering/Math,},
	year = {2003.},
	address = {[S.l.] :},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0072509317/chopaconline-20}
}