共 13 条
[1]
Bartos Jr M. J., 1977, D7719 US ARM ENG WAT
[3]
COMBS SM, 1979, THESIS U MINNESOTA S
[4]
COMBS SM, 1982, J ENV QUAL
[7]
GUPTA SC, 1978, D7836 U MINN TECHN R
[10]
LINDSAY WL, 1969, DEV DTPA MICRONUTRIE, P84