共 8 条
[2]
Cook C. W., 1951, J RANGE MANAGE, V4, P335
[3]
COOK CW, 1948, J ANIM SCI, V7, P170
[4]
HEIN MA, 1937, MD USDA TECH B, V538
[5]
HODGSON RE, 1942, WASHINGTON AGR EXP S, V411
[6]
RHOAD AE, 1945, USDA TECH B, V890
[7]
RICHARDS DE, 1945, OREGON AGR EXP STA B, V431