其他書名 | Better Cows, Fibrin in Milk, Bacteria in Milk, Silos and Silage, Alfalfa, Field Experiments with Fertilizers. 1889-1894 |
出版 | U.S. Department of Agriculture, 1889 |
URL | http://books.google.com.hk/books?id=jZM5AQAAMAAJ&hl=&source=gbs_api |
EBook | FULL_PUBLIC_DOMAIN |