
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