共 23 条
- [4] COMBS GF, 1960, 1960 P U MAR NUTR C, P28
- [7] HEYWANG BURT W., 1940, POULTRY SCI, V19, P29, DOI 10.3382/ps.0190029
- [8] HILL FW, 1962, NUTRITION PIGS POULT
- [10] JACKSON N., 1968, Record of Agricultural Research, Ministry of Agriculture, Northern Ireland, V17, P109