- An original steam engine still operating in a mill.
- The John Purves tug boat layout.
- Two EMD diesel engines with Marquette governors in the John Purves tug boat .
- WOODWARD PSG SERIES GOVERNOR COMPONENTS.
- UG8 repair manual 56103A.
- Page 5.
- The Marquette Metal Products Company's diesel engine fuel control name plate.
- An EMD diesel engine with a Marquette governor on display at the Maritime Museum in Door County, Wisconsin.
- BULLETIN 04022H.
- Patent 2,341,384
- Page 1.
- Page 4.
- Patent 2,341,384. Sheet 2 of 3.
- Page 2.
- An EMD diesel engine with a Marquette governor control on the John Purves tug boat -xx