@book{155183,
	author = {Williams, Linda D. and ebrary, Inc.},
	title = {Environmental science demystified},
	publisher = {McGraw-Hill,},
	year = {c2005.},
	series = {Demystified series},
	address = {New York :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10090702}
}