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- [15] PRECIPITATION PH - COMPARISON OF PH-METER WITH INDICATOR KITS JOURNAL OF THE AIR POLLUTION CONTROL ASSOCIATION, 1985, 35 (01): : 44 - 45
- [17] ADJUSTMENT OF PH-METER FOR MEASUREMENT OF SMALL CHANGES IN PH CHEMICKE LISTY, 1977, 71 (02): : 192 - 195
- [20] TECHNIQUE FOR INVESTIGATING ELECTRODE SYSTEM OF A PH-METER MEASUREMENT TECHNIQUES-USSR, 1966, (04): : 542 - &