@book{45750,
	author = {Zill, Dennis G.},
	title = {A first course in differential equations with modeling applications /},
	publisher = {Brooks/Cole, Cengage Learning,},
	year = {c2009},
	address = {Belmont, CA :},
	edition = {9th ed.},
	note = {Includes index},
	url = {http://www.loc.gov/catdir/toc/fy0805/2008924906.html}
}