共 7 条
[1]
BAILAR JC, 1953, INORGANIC SYNTHESIS, V4, P20
[3]
KALRA YP, 1966, THESIS U MANITOBA
[4]
PRATT LE, 1961, 12 MAN SOIL SURV SOI, P50
[5]
RACZ G. J., 1965, AGRON J, V57, P335
[6]
RUSSELL EW, 1961, SOIL CONDITIONS PLAN, P484
[7]
WEBBER MD, 1963, THESIS U MANITOBA