@book{21533,
	author = {Burton, David M.},
	title = {Introduction to modern abstract algebra},
	publisher = {Addison-Wesley Pub. Co.},
	year = {[1967]},
	series = {Addison-Wesley series in mathematics},
	address = {Reading, Mass.},
	note = {Expanded version published in 1972 under title: Abstract and linear algebra.}
}