共 24 条
[5]
HEJKAL TW, 1982, J AM WATER WORKS ASS, V74, P318
[7]
KESWICK BH, 1982, LANCET, V1, P109
[8]
KIM HW, 1977, J AM MEDICAL ASSOC, V237, P404
[9]
LYCKE E, 1978, LANCET, V2, P1056
[10]
MELNICK JL, 1973, B WORLD HEALTH ORGAN, V48, P263