共 20 条
[1]
ATKINSON JJ, 1945, USDATB 894
[2]
ATKINSON JJ, 1946, USDATB 917
[3]
BIRMINGHAM E, 1954, MAESRB 549
[5]
COLE JW, 1953, J ANIM SCI, V12, P900
[6]
CUMMINGS JN, 1951, 195 MINN AGR EXP STA
[7]
HANKINS OG, 1945, 731 US DEPT AGR CIRC
[9]
LOEFFEL WJ, 1943, NAESB 351
[10]
MENZIES-KITCHHT A. W., 1942, Journal of the Ministry of Agriculture, V49, P174