共 5 条
[1]
BERRYMAN CN, 1942, WASH AGR EXPT STA B, V440
[2]
Clark T. B., 1944, U S EGG AND POULTRY MAG, V50, P418
[3]
CLARK TB, 1944, US EGG POULTRY MAG, V50, P430
[4]
MARSDEN SJ, 1937, USDA YB SEPERATE, P1602
[5]
MISNER EG, 1945, AE520 CORN U AGR EXP