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- Conoco Travel Bureau11
- Continental Oil Company9
- Skelley, E. A9
- Phillips Petroleum Company8
- Oregon. State Highway Dept7
- Texas Company6
- Randall Motor Club4
- Standard Oil Company (Indiana)4
- Cartes Taride (Firm)3
- Montana. State Highway Commission3
- Shell Oil Company3
- Broome, B. C2
- Gulf Refining Company2
- New Mexico State Highway Commission2
- Oregon State Highway Commission2
- Peltier, Georges2
- Producers and Refiners Corporation2
- Rand McNally and Company2
- Wyoming. Dept. of Commerce and Industry2
- Wyoming. State Highway Commission2
