Hjalmar Petersen Resources
Records of Governors Floyd B. Olson, Hjalmar Petersen, and Elmer A. Benson, 1932-1938
Hjalmar Petersen papers, 1907-1968
Minnesota History magazine
- "A County Editor in Politics: Hjalmar Petersen, Minnesota Governor," by Steven J. Keillor, Fall 1983
Hjalmar Petersen of Minnesota: The Politics of Provincial Independence by Steven J. Keillor (St. Paul: Minnesota Historical Society Press, 1987)
Legislature Member Record, Minnesota Legislative Reference Library