- 7.
- Wisconsin's Gas Engines.
- Brad's Dad's Lakehouse on the shore of Lake Mendota, circa December 4, 2023.
- 2.
- 5.
- Curio.
- 10.
- 9.
- PMC First Quarter 1999.
- PMC March / April 1997.
- PMC Third Quarter 1998.
- WISCONSIN magazine of history.
- A Wisconsin history project.
- Prime Mover Control Third Quarter 1998.
- Prime Mover Control March / April 1997.