登入
選單
返回
Google圖書搜尋
The Essentials of a Successful Self-feeder for Swine, for Concentrated Feeds
John Marcus Evvard
Jay Brownlee Davidson
William Arthur Foster
出版
Agricultural Experiment Station, Iowa State College of Agriculture and the Mechanic Arts
, 1922
URL
http://books.google.com.hk/books?id=k30kAQAAMAAJ&hl=&source=gbs_api