@book{30754,
	author = {Rotman, Joseph J.},
	title = {An introduction to homological algebra},
	publisher = {Springer Science+Business Media, Inc.,},
	year = {2009},
	series = {Universitext},
	address = {New York:},
	edition = {2nd},
	note = {"Purchased under NBHM grant for the year 2008-2009"}
}