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Willis Jay Leighty
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Soil survey, Deschutes area, Oregon
Willis Jay Leighty, A. E. Kocher, United States. Soil Conservation Service · U.S. Govt. Print. Off.
106 sayfa · 1958
Soil surveys / Soils / Maps / Études pédologiques
Soil survey Marshall County Kentucky
Willis Jay Leighty, C. E. Wyatt, Kentucky Agricultural Experiment Station, Tennessee Valley Authority · U.S. Dept. of Agriculture
109 sayfa · 1950
Soil surveys / Soils