该书已不再出版。
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.
出版物详细信息
- 已出版: 2000
- 出版者: U.S. Dept. of Agriculture, Soil Conservation Service
- Dewey Decimal: 630
- ECHO 图书馆: 630 USD