共 18 条
[1]
*AGR ED ASS GREAT, 1926, J AGR SCI, V16, P123
[2]
*AGR ED ASS GREAT, 1906, J AGR SCI, V1, P470
[3]
BRIGGS LJ, 1907, USDA BUR SOILS B, V45
[4]
COULTS JRH, 1924, ROY SOC LONDON P A, V106, P33
[5]
COULTS JRH, 1926, T FARADAY SOC, V21, P374
[6]
FISHER RA, 1924, ROY SOC EDINB P, V44, P88
[8]
The determination of clay in heavy soils
[J].
JOURNAL OF AGRICULTURAL SCIENCE,
1921, 11
:293-303
[9]
KRAUSS G, 1923, INT MITT BODENK, V13, P147
[10]
KRAUSS G, 1922, P 3 INT SOIL C PRAG