@book{6598,
	author = {Keedy, Mervin L. },
	title = {Trigonometry  : },
	publisher = {Holt, Rinehart and Winston,},
	year = {c1969.},
	address = {New York  :},
	url = {http://www.loc.gov/catdir/enhancements/fy0608/00130286-d.html}
}