1981. United States. Soil Conservation Service. Shows land use.; Relief shown by hachures.; Sheet 1 of 2 shows Northern portion.; "October 1980."; Includes location map.; Text on verso.; "M7-E-24... USDA-SCS (Portland, Or.).
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1981. United States. Soil Conservation Service. Shows land use.; Relief shown by hachures.; Sheet 2 of 2 shows southern portion.; "October 1980."; Includes location map.; Text on verso.; "M7-E-24... USDA-SCS (Portland, Or.).