Biblioteca Rector Machado y Nuñez: Veduta del Anfiteatro Flavio detto il Coloseo
U.S. National Archives: Two of the boys on night shift in the More, Jonas Glass Co. Bridgeton, N.J., November 1909
U.S. National Archives: Tony Casale, 11 years old, been selling 4 years. Sells sometimes until 10 P.M. His paper told me the boy had shown him the marks on his arm where his father had bitten him for not selling more papers, March 1909
U.S. National Archives: Young cigarmakers in Engelhardt & Co. Three boys looked under 14, January 1909
U.S. National Archives: Some adolescents in Bibb Mfg. Co. Macon, Ga, January 1909
U.S. National Archives: A typical glass works boy, night shift. Said he was 16 years old, August 1908