@book{5826,
	author = {Asche, David.},
	title = {An introduction to groups /},
	publisher = {A. Hilger ;},
	year = {c1989.},
	address = {Bristol, England ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0668/88039831-d.html}
}