共 11 条
- [1] Buckingham E., 1904, USDA BUR SOILS B, V25
- [2] CANNON WA, 1925, CARNEGIE I WASH PUBL, V368
- [5] KEEN BA, 1931, PHYSICAL PROPERTIES, P334
- [6] KOLTHOFF LM, 1946, POLAROGRAPHY
- [9] RANEY W. A., 1950, SOIL SCI SOC AMER PROC, V14, P61
- [10] RUSSELL MB, 1950, MONOGRAPH AGRONOMY D