Autor:	Mack, George, Painter, Robert G., Demmin, Allen C., Schultz, Jerome J., Adkins, Arthur, Woods, John J., Scruggs, James A., Verley, Donald E., Schappert, Robert C., Wallington, Clint, Newmann, Fred M.
Zdroj:	The Phi Delta Kappan, 1977 Sep 01. 59(1), 75-77.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/20298849 Zobrazit plný text záznamu