Northern Prairie Wildlife Research Center
Koch spent a summer and winter at the mouth of the Musselshell River as a woodhawk and wolfer. After concluding his work along the Missouri River, he traveled to Helena. Koch kept a journal detailing his work, travels, and observations of wildlife. His son summarizes much of the wildlife observations in a Journal of Wildlife Management article on the early history of big game in Montana.
Koch, E. 1941. Big game from early historical records. J. Wildl. Manage. 5:357-70. Koch, P. 1929. Journal of Peter Koch. The Frontier, Missoula, MT., Vol. 9, No. 2, January 1929.