1. Banerjee, G.: Naturwissenschaften 7, 177 (1955).
2. Datta, S. K.: Z. analyt. Chem. in press.
3. Datta, S. K., and G. Banerjee: J. Indian chem. Soc. 31, 149, 397, 773, 779, 929 (1954); 32, 167, 231 (1955).
4. Datta, S. K., and G. Banerjee: J. Indian chem. Soc. 31, 397 (1954).
5. Datta, S. K., and G. Banerjee: Anal. chim. Acta (Amsterdam) 12, 38 (1955).