@book{2560,
	author = {Halstead, S. B. and Walsh, J. A.},
	title = {Good health at low cost.},
	publisher = {The Rockefeller Foundation,},
	year = {1985.},
	address = {New YorK : },
	note = {Proceedings of a conference held at the Bellgaio Conference Center, Bellagio, Italy, April 29-May 3, 1985, sponsored by The Rockefeller Foundation.}
}