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- Softwoods -- Drying -- Defects 1
- Sogdian inscriptions 2
- Sogdiana 2
- Soghum bicolor 1
- SOI 2
- Soil 1
- soil 1
- Soil absorption and adsorption 1
- Soil aggregation 1
- soil analysis 1
- Soil carbon amendment 1
- soil chemicophysical properties 1
- Soil chemistry -- Mathematical models 5
- soil conservation 1
- Soil conservation -- Economic aspects -- Oregon 1
- Soil conservation -- Idaho -- Camas Prairie 1
- Soil conservation -- Lower Columbia River Watershed (Or. and Wash.) 1
- Soil conservation -- Northwest, Pacific 1
- Soil conservation -- Northwest, Pacific -- Research 1
- Soil conservation -- Oregon 2