Autor:	Gifford,, Adam, Ginzberg, Eli, Marwick, David, West, Jude P., Davey, Harold W., Cox, R. W., Warner, Malcolm, Taggart, Robert, Slanicka, C. J., Ashenfelter, Orley
Zdroj:	Industrial and Labor Relations Review, 1973 Jan 01. 26(2), 902-912.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2521708 Zobrazit plný text záznamu