Autor:	Alexander, Archibald S., Wiggins, A. L. M., Wellings, A. J., Greenslit, H. Vance, Mueller, Paul J., Ramspeck, Robert, Schell, Samuel D., Finch, George G., English, Henry E., Sibley, John A., Yount, Paul F.
Zdroj:	National Defense Transportation Journal, 1949 Nov 01. 5(6), 22-41.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/44098544 Zobrazit plný text záznamu