共 11 条
[2]
COMAR CL, 1951, NUCLEONICS, V8, P19
[5]
MacINTIRE W. H., 1926, JOUR AMER SOC AGRON, V18, P482
[9]
PEARSON RW, 1949, SOIL SCI SOC AM P, V13, P153
[10]
SHAW WM, 1949, TENN AGR EXP STA B, V212