1. Spectroscopic Properties of Uranium Compounds;Dieke,1949
2. Spectroscopy and Photochemistry of Uranyl Compounds;Rabinowitch,1964
3. STUDY OF PHOTOLUMINESCENCE IN GLASS*
4. Coloured Glasses;Weyl,1951
5. A.F. Leung, Journal of Non-Crystalline Solids, to be published.