共 4 条
[1]
GARVER S, 1922, USDA B, V1087, P23
[2]
GARVER S, 1946, S DAK AGR EXPT STA B, V383, P66
[3]
Oakley R., 1917, USDA B, V428, P19
[4]
OAKLEY RA, 1913, USDA BPI115 CIR