"Bodies Indicate Instant Death of All 55 Miners," Trinidad Advertiser, October 12, 1910
Frances Flora Bond Palmer, Across the Continent: "Westward the Course of Empire Takes Its Way," 1868
Views of the Coal-Powered West: Photos of Pueblo and Denver
Two Photographs of Primero, Colorado
Indemnity Ledger for Victims of the Delagua Explosion, Victor-American Fuel Company, 1910
Newspaper Editors Weigh In on Preventing Future Disasters
Letter from Local Union Leader to the Deputy Labor Commissioner of Colorado, July 17, 1910