This primary source comes from the Records of the Bureau of Indian Affairs.
National Archives Identifier:
285779Full Citation: Covering the Roof of a Root Cellar with Horse Drawn Equipment; ca. 1937; Records of the Bureau of Indian Affairs, Record Group 75. [Online Version, https://docsteach.org/documents/document/covering-the-roof-of-a-root-cellar-with-horse-drawn-equipment, May 16, 2024]