- PMC MAY 1985 PLANT NEWS. PAGE 8.
- PMC MAY 1985 PLANT NEWS.
- From the mailbox in 1968.
- Snow Bird's at the Martin's house.
- Erl Martin's back yard looking down at the Rock River, circa 1957.
- The Martin "snow birds" spent their winters living in Arizon for the winters.
- Researching and documenting the evolution of the Woodward governor.
- The Woodward T700/CT7 project history.
- 20
- 16B
- 16
- 8B
- 6
- 5C
- 5B