共 16 条
[1]
BOAZ TG, 1959, AHS11959 DEP AGR U L
[2]
COOPER MM, 1959, NATIONAL SHEEP BREED, P5
[4]
DICKSON G. R., 1959, JOUR BRIT GRASSLAND SOC, V14, P172
[5]
GRACEY JF, 1961, NATIONAL SHEEP BREED, P23
[6]
HARRISON A, 1961, 38 MISC COST STUD U
[7]
KYDD DD, 1966, J BRIT GRASSLAND SOC, V21, P284
[8]
LEECH F. B., 1959, JOUR AGRIC SCI, V52, P117, DOI 10.1017/S0021859600035747
[9]
Parfitt J. W., 1955, Laboratory Practice London, V4, P15
[10]
ROBERTS BH, 1949, 19493 U COLL WAL REP