@book{61534,
	author = {Mill, John Stuart, and Ashley, W. J.},
	title = {Principles of political economy :},
	publisher = {Longmans, Green, and Co.,},
	year = {1909.},
	address = {London :},
	note = {"The text is that of the seventh edition (1871) ... [with] notes of all the significant changes or additions made by Mill in the course of the six editions revised by himself."--Editor's pref.},
	url = {http://catalog.hathitrust.org/api/volumes/oclc/1533615.html}
}