@book{21693,
	author = {Diefenderfer, Caren L.},
	title = {The calculus collection :},
	publisher = {Mathematical Association of America,},
	year = {c2010.},
	series = {Classroom resource materials},
	address = {Washington, DC :},
	url = {http://www.loc.gov/catdir/enhancements/fy1201/2009937591-b.html}
}