1. Brian Clark Howard, “5 Surprising Facts About Nikola Tesla,” National Geographic, 3 October 2013, https://www.nationalgeographic.com/news/2013/10/131003-nikola-tesla-surprising-facts-statue-museum-science/#close.
  2. Erwin D. Canham, Commitment to Freedom: The Story of The Christian Science Monitor (Boston: Houghton Mifflin Company, 1958), 54.
  3. ”Items of Interest” was a feature in the Christian Science Sentinel that quoted from other publications.