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Dust Bowl Era, 1931-1939 Droughts Great Plains History 20th century Dust storms Great Plains History 20th century Depressions 1929 Great Plains Great Plains History 20th century Great Plains Social conditions 20th century Social history Dust storms Great Plains History 20th century Social Conditions Depressions 1929 Great Plains Great Plains History 20th century Great Plains Social conditions 20th century social history HISTORY United States 20th Century History Social history Dust Bowl Era, 1931-1939 Depressions Droughts Dust storms Social conditions Great Plains Trockenheit Wirtschaftskrise Landwirtschaft Soziale Situation Great Plains Süd Droogte Stofstormen Dust Bowl Era, 1931-1939 Droughts Great Plains History 20th century Dust storms Great Plains History 20th century Depressions 1929 Great Plains Great Plains History 20th century Great Plains Social conditions 20th century Dust Bowl Era, 1931-1939 Droughts Great Plains History Dust storms History Great Depression, 1929-1939 Great Plains Great Plains History Great Plains Social conditions