@book{64958,
	author = {Worswick, G. D. N. and Royal Economic Society (Great Britain)},
	title = {The Concept and measurement of involuntary unemployment /},
	publisher = {Allen and Unwin,},
	year = {c1976.},
	address = {London :},
	note = {Papers delivered at a conference of the Royal Economic Society held at Durham in March 1974.}
}