登入選單
返回Google圖書搜尋
A The Value of Urea as a Substitute for Protein in the Rations of Dairy Cattle
S. BartlettSir Kenneth Lyon Blaxter
其他書名
Field trials with dairy cows. I.
出版National Institute for Research in Dairying, 1946
URLhttp://books.google.com.hk/books?id=N3Q5QwAACAAJ&hl=&source=gbs_api