@book{126552,
	author = {Phelps, Edmund S. and Russell Sage Foundation.},
	title = {Altruism, morality, and economic theory /},
	publisher = {Russell Sage Foundation,},
	year = {1975.},
	address = {New York :},
	note = {Based on the proceedings of a conference held March 3-4, 1972, sponsored by the Russell Sage Foundation.}
}