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3. P. Ellis, R.G. Wilkins, and M.J.G. Williams, J. Chem. Soc, (1957)4456.
4. G.C. Lalor, J. Inorg. Nucl. Chem., 30(1968)1925; ibid., 31(1969)1783.
5. The efficiency of this chemistry and the utilization of the imagewise released ammonaa for image visualization has been reported by A. Adin and J.C. Fleming, Unconventional Photographic System., Abstracts of papers, SPSE Sympoiium, Washington, D.C., Nov., 1975, p. 17.