1. A. A. Benedetti-Pichler, Introduction to the Microtechnique of Inorganic Analysis, John Wiley and Sons, Inc., New York, 1942.
2. F. R. M. McDonnell andC. L. Wilson, Metallurgia39, 280, 336 (1949);40, 61, 115, 339 (1949).
3. A. J. Mee, A New System of Elementary Qualitative Analysis, Dent, London, 1942.
4. H. M. El-Badry, F. R. M. McDonnell andC. L. Wilson, Analyt. Chim. Acta4, 440 (1950).
5. H. M. El-Badry andC. L. Wilson, Mikrochem.40, 141 (1952).