1895 to 1901 – Berea Hypothetical Region
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1917 – Physiographic Provinces
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1918 – Berea Region
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1921 – John C. Campell’s Region
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1935 – USDA small region
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1935 – USDA full region
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1940 – Works Progress Administration – Rural Cultural Region “Allegheny”
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1940 – Works Progress Administration – Rural Cultural Region “Appalachia”
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1940 – Works Progress Administration – Rural Farm Cultural Region
“Allegheny”
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1940 – Works Progress Administration – Rural Farm Cultural Region
“Appalachia”
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1962 – Ford region
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1964 – PARC
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1965 – Original ARC Region
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1965 – ARC second iteration
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1967 ARC
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1978 – Watts Mountain Terrain
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1978 – Watts Socioeconomic Region
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1978 – Watts Homogeneous Region
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1983 – Raitz and Ulack Region
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1990 – ARC
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1991 – ARC
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1994 – Paul Salstrom’s Region
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1998 – ARC
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2002 – ARC
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2008 – ARC
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2002 – Core Region from John Alexander Williams
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1996 – Consensus Region from John Alexander Williams
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1996 – Loose Region from John Alexander Williams
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