Whittaker, William E. (March 10, 2016). "An Analysis of Historic-Era Indian Locations in Iowa". Midcontinental Journal of Archaeology. 41 (2): 159–185. doi:10.1080/01461109.2016.1156799. S2CID163755581.
"Station: Decorah, IA". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Retrieved June 25, 2021.
Whittaker, William E. (March 10, 2016). "An Analysis of Historic-Era Indian Locations in Iowa". Midcontinental Journal of Archaeology. 41 (2): 159–185. doi:10.1080/01461109.2016.1156799. S2CID163755581.