该书已不再出版。
This manual grew out of both the teaching given at the seminar on extension and the ideas shared by the participants from their own experiences as workers in the field.
89 pages, illustrated
出版物详细信息
- 已出版: 1993
- 出版者: Rurcon
- Dewey Decimal: 630.717
- ECHO 图书馆: 630.717 WAL