Service Bulletins
- S-35, Factory Service Bulletin
- S-89, Installing Flywheel Ring Gears
- S-297, Winter Storage, January 6, 1927
Company Correspondence
- Cummins Auto Sales to Star Motor Company, February 16, 1924
- Detroit, November 20, 1929
- Detroit, December 23, 1931
- Detroit, June 8, 1936
- Detroit, June 19, 1936