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- [26] THE INFLUENCE OF HYDROGEN-ION CONCENTRATION ON THE SURFACE TENSION OF SOME COLLOIDAL SOLUTIONS JOURNAL OF PHYSIOLOGY-LONDON, 1938, 92 (02): : 151 - 159
- [29] REPORT ON HYDROGEN-ION CONCENTRATION OF SOILS JOURNAL OF THE ASSOCIATION OF OFFICIAL AGRICULTURAL CHEMISTS, 1951, 34 (03): : 588 - 589