1. Boyd, J. Chem. Educ., 3, 36 (1959). This paper gives full references to the chemistry of technetium and its compounds.
2. Thomason, Oak Ridge Report ORNL 2453, 7 (1958). See also ref. 1.
3. Crouthamel, Anal. Chem., 29, 1756 (1957).
4. Curtis, Fergusson and Nyholm, Chem. and Indust., 625 (1958). Also Fergusson and Nyholm, ibid., 1555 (1958).
5. Kotani, J. Phys. Soc. Japan, 4, 293 (1949).