共 18 条
- [1] BELL DD, 1972, POULTRY DIGEST, V31, P326
- [2] BELL DD, 1977, POULTRY TRIBUNE, V83, P14
- [4] ELSON HA, 1976, ADAS GLEADTHORPE POU, P78
- [5] EMMANS GC, 1977, NUTRITION CLIMATIC E
- [6] Hill A. T., 1973, 4th European Poultry Conference, London, 1972., P605