共 9 条
[2]
BEESON WM, 1957, U AGR EXP STA MIMEO, V204
[3]
BEESON WM, 1956, PURDUE U AGR EXP STA, V169
[4]
BURROUGHS, 1957, IOWA STATE COLLEGE A, V221
[5]
CONRAD JH, 1956, PURUDE U AGR EXP STA, V183
[6]
CULBERTSON CC, 1957, IOWA STATE COLLEGE A, V222
[7]
KOLARI OE, 1957, B13A U MINN AGR EXP
[9]
PERRY TW, 1957, J ANIMAL SCI, V17, P164