共 6 条
[1]
BRIGGS LJ, 1907, USDA BUR SOILS B, V45
[2]
KLUTE A., 1950, SOIL SCI SOC AMER PROC, V14, P24
[3]
PEECH M, 1947, USDA757 CIRC
[6]
1945, OFFICIAL TENTATIVE M