«Special Reports: A Pittsburgh Century,» Pittsburgh Post-Gazette, ; «TROOPERS STOP MEETINGS: Arrest 19 Men Including Labor Union Organizers.»
275
Hillstrom and Hillstrom, The Industrial Revolution in America, 103–7.
276
Charles Rumford Walker, Steel: The Diary of a Furnace Worker (Boston: The Atlantic Monthly Press, 1923), 156.
277
John Hinshaw and Peter N. Stearns, Industrialization in the Modern World: From the Industrial Revolution to the Internet, vol. 1, A-L (Santa Barbara: ABC–CLIO, 2014), 4.