Lessons from the Dust Bowl: dryland agriculture and soil erosion in the United States and South Africa, 1900-1950.
Phillips
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D000383:Agriculture / Q000191:economics / Q000193:education / Q000266:history / Q000331:legislation & jurisprudence; D003247:Conservation of Natural Resources / Q000191:economics / Q000266:history / Q000331:legislation & jurisprudence; D004467:Economics / Q000266:history / Q000331:legislation & jurisprudence; D004651:Employment / Q000191:economics / Q000266:history / Q000331:legislation & jurisprudence / Q000523:psychology; D004787:Environmental Pollution / Q000191:economics / Q000266:history / Q000331:legislation & jurisprudence; D005523:Food Supply / Q000191:economics / Q000266:history / Q000331:legislation & jurisprudence; D005524:Food Technology / Q000191:economics / Q000193:education / Q000266:history / Q000331:legislation & jurisprudence; D049673:History, 20th Century; D015146:Midwestern United States / Q000208:ethnology; D013019:South Africa / Q000208:ethnology; D014481:United States / Q000208:ethnology