1. Tana de Gamez and Arthur R. Pastore, Mexico and Cuba on Tour Own (New York: R.D. Cortina Co., 1954), 7.
2. Jane Bussey, “Mexico City in Transition,” Travel Section J, The Miami Herald (February 18, 2001).
3. By the early twentieth century, tourism in the United States had shifted from elite groups taking Grand Tours to Europe and middle sectors taking romantic tours to Niagara Falls to an entirely new experience of a pleasure vacation to cities like Chicago, Washington, DC, and New York. See Catherine Cocks, Doing the Town: The Rise of Urban Tourism in the United States, 1850–1915 (Berkeley: University of California Press, 2001)
4. Edmund Swinglehurst, Cook’s Tours: The Story of Popular Travel (New York: Blandford Press, 1982).
5. John Jenkins, “Motor Sparks,” Chicago Daily News (February 9, 1939). Clipping in Centro de Estudios de Historia de México CONDUMEX, Fondo: Luis Montes de Oca (hereafter CEHM: LMDO) 355/32972.