@book{1934,
	author = {Silverman, Herbert Albert, and Curzon, L. B.},
	title = {The Substance of Economics /},
	publisher = {Pitman,},
	year = {1964},
	address = {London :},
	edition = {16th ed.},
	note = {First-16th ed. published under title: The substance of economics for the student and the general reader, by H. A. Silverman.}
}