This yearbook tells how to keep livestock healthy. Discovering how to combat diseases and parasites and applying the discoveries after they are made demand the mobilization of brains and skill much as they are mobilized for war.
- 已出版: 1942
- 出版者: U.S. Government Printing Office
- Dewey Decimal: 636.089
- ECHO 图书馆: 636.089 USG