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- Trimble, Marshall4
- Colton, Harold Sellers, 1881-19703
- United States. Forest Service. Southwestern Region3
- Abbey, Edward, 1927-19892
- Baxter, Frank Condle2
- Bufkin, Don2
- Cook, James E.2
- Negri, Sam2
- Phoenix Chamber of Commerce (Phoenix, Ariz.)2
- Smith, Dean, 1923-20122
- Thollander, Earl2
- United States. Department of Agriculture2
- American Motorists Association1
- Automobile Club of Southern California1
- Baxter, Frank C. (Frank Condie), 1896-19821
- Colton, Harold Sellers, 1881-1
- Fred Harvey (Firm)1
- Kaibab National Forest (Ariz.)1
- Manning, Reg, 1905-19861
- National City Chamber of Commerce1