共 11 条
- [1] ECKLES, 1910, MO AGR EXP STA RES B, V2
- [2] GAINES, 1926, ILL AGR EXP STA B, V272
- [3] HAMMOND, 1927, REPRODUCTION COW
- [4] HAMMOND, 1923, J AGR SCI 1, V13
- [5] HAYS, 1926, J DAIRY SCI, V9
- [6] ROBERTS, 1926, J AGR SCI 3, V16
- [7] SANDERS, 1923, J AGR SCI 2, V13
- [8] TURNER, 1926, J DAIRY SCI, V9
- [9] WOODMAN, 1926, J AGR SCI 2, V16
- [10] WYLIE, 1925, J AGR SCI 2, V8