This primary source comes from the Records of the Bureau of Plant Industry, Soils, and Agricultural Engineering.
National Archives Identifier:
516537Full Citation: ongest pontoon bridge in the world, spanning Russellville and Dardanelle, Arkansas; 1900 - 1918; Records of the Bureau of Plant Industry, Soils, and Agricultural Engineering, Record Group 54. [Online Version, https://www.docsteach.org/documents/document/ongest-pontoon-bridge-in-the-world-spanning-russellville-and-dardanelle-arkansas, May 15, 2024]