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- [6] Determination of hydrogen-ion concentration with photoelectric colorimeter INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION, 1931, 3 : 0169 - 0171
- [7] On the colorimetric determination of hydrogen-ion concentration in soils JOURNAL OF AGRICULTURAL SCIENCE, 1923, 13 : 69 - 73
- [8] Hydrogen-ion concentration in relation to animal and plant growth. JOURNAL OF THE FRANKLIN INSTITUTE, 1924, 197 : 741 - 756
- [9] Relation of hydrogen-ion concentration to filter-plant operation JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY-US, 1922, 14 : 1038 - 1040
- [10] The determination of the hydrogen-ion concentration of the blood. JOURNAL OF PHYSIOLOGY-LONDON, 1926, 61 (03): : 448 - 454