- Woodward bulletin number 18007.
- Woodward bulletin number 18005B
- Woodward bulletin 18007.
- Woodward bulletin 18005b
- WGC CTL JANUARY 1996.
- Looking back 25 years ago to January 1996.
- Allis-Chalmers Manufacturing Company History.
- AC Company history page 3.
- AC Company history page 2.
- A vintage advertisement from 1918.
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