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4764-1973, . (1984). TOLERANCE LIMITS FOR SEWAGE EFFLUENTS DISCHARGED INTO INLAND SURFACE WATERS. DELHI: ISI.
4764-1973, . 1984. TOLERANCE LIMITS FOR SEWAGE EFFLUENTS DISCHARGED INTO INLAND SURFACE WATERS. DELHI: ISI.
4764-1973, . TOLERANCE LIMITS FOR SEWAGE EFFLUENTS DISCHARGED INTO INLAND SURFACE WATERS. DELHI: ISI. 1984.