该书已不再出版。
This booklet describes what a demonstration entails, how to get ready for the demonstration, and how to conducting your demonstration.
Extension Service, US Dept. of Agriculture
14 pages, illustrated, photos
出版物详细信息
- 已出版: 1974
- 出版者: U.S. Dept. of Agriculture, Extension Service in cooperation with U.S. AID
- Dewey Decimal: 371.1
- ECHO 图书馆: 371.1 USD