@book{63492,
	author = {C-E-I-R, ltd.},
	title = {Mathematical model building in economics and industry.},
	publisher = {Hafner Pub. Co.},
	year = {1968.},
	address = {New York},
	note = {Collected papers of a conference entitled "Model building in economics and industry," organized by C-E-I-R Ltd. and held in London, July 4-6, 1967.}
}