共 9 条
[2]
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[3]
ECKLES CH, 1916, MO AGR EXPT STA RES, V26, P3
[4]
HAMMOND J, 1927, PHYSL REPRODUCTION C
[5]
Miller FW, 1931, J AGRIC RES, V43, P0627
[6]
Nichols C. W., 1944, American Journal of Veterinary Research, V5, P135
[7]
SWETT WW, 1948, USDA TECH B, V964
[8]
TURNER CW, 1930, MO AGR EXPT STA RES, V140
[9]
[No title captured]