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- Agriculture 2
- Birds--Conservation 2
- United States. Bureau of Biological Survey 2
- Wildlife refuges 2
- Burning of land 1
- California Oregon Power Company 1
- Coasts--Oregon 1
- Conservation of natural resources 1
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- Geological Survey (U.S.) 1
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- Izaak Walton League of America 1
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- Land use--Planning 1
- Midge 1
- Oregon State Agricultural College 1
- Oregon State Planning Board 1
- Oregon State Planning Council 1