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Creator
- Holderman, Woody 42
- Oregon. State Highway Department 18
- Frodsham, Harold 17
- Kable, George W. 9
- Matthews, Oliver Vincent, 1892-1979 4
- United States. Department of Agriculture 3
- Ackerman, G. W. 2
- Reasons, Bill 2
- Burke, Melvin H. 1
- Fowler, R. G. 1
- Mason, Robert George 1
- Nash, Wallis 1
- Oregon State Highway Commission 1