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AIB no. 99

24 pages, illustrated, photos

Personal study by the author in 1938-1939, studying the record of agriculture in countries wehre the land had been under cultivation for hundreds or thousands of years. 

Publication Details

  • Published: 2000
  • Publisher: U.S. Dept. of Agriculture, Soil Conservation Service
  • Dewey Decimal: 630
  • ECHO Library: 630 USD