- Buffet dinner was served at Billion Gallon Day, December 14, 1944
- Audience enjoying floor show at Billion Gallon Day, December 14, 1944
- Guests leaving the exhibit area at Billion Gallon Day, December 14, 1944
- Joint conference group, 1932
- Joint conference group, 1932
- Joint conference group, 1932
- Development department and engineering department, circa 1932
- Machinist and blacksmith department, October 26, 1920
- Machinists and boilermakers, August 25, 1931
- Main office staff of Humble Oil, 2 of 2, August 17, 19311
- Main Office Staff of Humble Oil, 1 of 2, August 17, 1931
- Main office staff for Humble Oil, 1928
- Research and technical staff of Humble Oil, circa 1940
- Boilermakers and welders of Humble Oil, circa 1931
- Humble Oil Utilities Department, circa 1940