Rand McNally and Company. "July 1918 : Iowa-Michigan," Rand McNally Bankers Directory (July 1918). https://fraser.stlouisfed.org/title/105/item/604217/content/pdf/rmbd_191807_04_iowa, accessed on July 27, 2024.
Rand McNally and Company. "July 1918 : Iowa-Michigan," Rand McNally Bankers Directory (July 1918). https://fraser.stlouisfed.org/title/105/item/604217/content/pdf/rmbd_191807_04_iowa, accessed on July 27, 2024.