@book{8678,
	author = {Ayres, Frank, and Moyer, Robert E.},
	title = {Schaum's outline of theory and problems of trigonometry :},
	publisher = {McGraw-Hill,},
	year = {c1999.},
	series = {Schaum's outline series},
	address = {New York :},
	edition = {3rd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/mh023/98040457.html}
}