@book{206123,
	author = {Messer, Robert. and Straffin, Philip D.},
	title = {Topology now!},
	publisher = {Mathematical Association of America},
	year = {c2006.},
	series = {Classroom resource materials},
	address = {[Washington, DC]},
	url = {http://www.loc.gov/catdir/enhancements/fy0633/2005937270-t.html}
}