共 4 条
[1]
Day R.P., 1965, METHODS SOIL ANAL 1, P545, DOI DOI 10.2134/AGRONMONOGR9.1.C43
[2]
1960, NCR PUB, V76
[3]
1979, SAS USERS GUIDE
[4]
1972, USDA1 SOIL CONS SERV