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Creator
- United States. Army. Office of the Chief of Engineers 72
- United States. War Department 11
- Wulzen, Albert Henry 6
- Freeman, Lewis R. (Lewis Ransome), 1878- 2
- MacNaughton, Ernest B. 2
- Oregon State University 2
- Raymond, Herbert E. 2
- Dresel, Emil 1
- Hallock, Absolom B. 1
- Kuchel & Dresel 1
- Kuchel, Charles Conrad, 1820- 1
- Lawrence, Ellis Fuller 1
- Lazarus, Edgar Marks 1
- Little, David 1
- Oregon Agricultural College 1