@book{201847,
	author = {Sweezy, Paul M.},
	title = {Four lectures on Marxism /},
	publisher = {Monthly Review Press,},
	year = {c1981.},
	address = {New York :},
	note = {Presented at Hosei University in Tokyo in the fall of 1979.},
	url = {http://www.loc.gov/catdir/enhancements/fy0833/81081694-b.html}
}