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Farm-operator family level-of-living for counties of the United States, 1930, 1940, 1945, and 1950
- "Farm-operator family level-of-living for counties of the United States, 1930, 1940, 1945, and 1950"
- "Farm-operator family level-of-living for counties of the United States, 1930, 1940, 1945, and 1950"@en
- "Farm Operator Family Level-Of-Living Indexes For Counties of the United States - 1930, 1940, 1945, and 1950"
- "Farm-operator family level-of-living indexes for counties of the United States, 1930, 1940, 1945, and 1950"@en