共 4 条
- [1] Hill A. T., 1973, 4th European Poultry Conference, London, 1972., P605
- [2] Hughes B. O., 1975, Economic factors affecting egg production. Proceedings of the Tenth Poultry Science Symposium, 18-20th September 1974., P271
- [3] Wells R. G., 1973, 4th European Poultry Conference, London, 1972., P617
- [4] Wills R. J. R., 1975, Economic factors affecting egg production. Proceedings of the Tenth Poultry Science Symposium, 18-20th September 1974., P105