共 5 条
[1]
BRAGE B. L., 1960, SOIL SCI SOC AMER PROC, V24, P294
[2]
COOKE GW, 1961, AGROCHIMICA, V5, P189
[3]
COURT MN, 1962, NATURE, V194, P1265
[4]
CUMMINS D. G., 1961, SOIL SCI SOC AMER PROC, V25, P47
[5]
STANFORD GEORGE, 1957, SOIL SCI SOC AMER PROC, V21, P612