@book{53583,
	author = {Hardy, Darel W. and Walker, Carol L.},
	title = {Applied algebra :},
	publisher = {Chapman & Hall/CRC ,},
	year = {2009},
	series = {Discrete mathematics and its applications},
	address = {Boca Raton  :},
	edition = {2nd ed.},
	note = {"A Chapman & Hall book"}
}