Autor:	Gullen, Donald E., Otter, Casten V., Friedman, Harvey L., Campbell, Angus, Hardin, Einar, Buzzard, R. B., Stein, Bruno, Northrup, Herbert R., Perloff, Robert, Johnson, Paul V., Marshall, Ray, Crispo, John, Samuels, Norman J., McIntyre, Alister
Zdroj:	Industrial and Labor Relations Review, 1972 Apr 01. 25(3), 456-470.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2521338 Zobrazit plný text záznamu