Tags: Extension Service - Iowa State College of Agriculture and Mechanic Arts, Hardin County - IA, Soil Conservation Service
Tags: Hardin County - IA, Map, Soil Conservation Service
Tags: Map, Poweshiek County - Iowa, Soil Conservation Service
Tags: Agricultural Extension Service, Iowa State College of Agriculture and Mechanical Arts, Soil Conservation Service
Tags: Benton County Soil and Water Conservation District, Civilian Conservation Corp, Soil Conservation Service
Tags: Black Hawk County Soil and Water Conservation District, Leroy Brown, Soil Conservation Service
Tags: Black Hawk County, Soil Conservation Service
Tags: Soil Conservation Service, Wilson Scaling
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