@book{60990,
	author = {Naft, Stephen, and De Sola, Ralph,},
	title = {International conversion tables /},
	publisher = {Cassell,},
	year = {1965},
	address = {London :},
	edition = {Rev. and enl. /},
	note = {First published in 1931 under title: Conversion equivalents in international trade.}
}