共 64 条
[3]
BREKKE T, 1948, RESULTATER KONTROLLE
[4]
BULL S, 1929, ILL AGR EXP STA B, V322
[5]
CARROLL WE, 1929, ILL AGR EXP STA B, V321
[6]
CARROLL WE, 1942, ILL AGR EXP STA B, V489
[8]
CLAUSEN H, 1953, IMPROVEMENT PIGS
[9]
CLAUSEN H, 1958, SAMMENLIGNENDE FORSO, P304
[10]
CRAFT WA, 1953, USDA916 CIR