共 21 条
- [3] BROADBENT L., 1948, PROC ROY ENT SOC LONDON SER A, V23, P57
- [4] COCKBAIN AJ, 1965, 12 P INT C ENT LOND, P521
- [6] GOODMAN P. J., 1966, Agric. Progr., V41, P89
- [7] HOLMES J C, 1966, Experimental Husbandry, P65
- [9] HULL R, 1967, 1966 ROTH EXP STN RE, P295
- [10] HULL R, 1966, 1965 ROTH EXP STN RE, P260