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- [9] Colorimetric methods for the determination of phosphorus - In the presence of silica, arsenic, iron, and nitrates INDUSTRIAL AND ENGINEERING CHEMISTRY-ANALYTICAL EDITION, 1935, 7 : 0227 - 0230
- [10] COLORIMETRIC DETERMINATION OF SMALL AMOUNTS OF PHOSPHORUS IN THE PRESENCE OF LARGE AMOUNTS OF VANADIUM INDUSTRIAL LABORATORY, 1958, 24 (04): : 456 - 456