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- [9] LUMINESCENCE OF ALKALINE-EARTH BORATE-PHOSPHATES ACTIVATED WITH DIVALENT EUROPIUM JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1969, 31 (02): : 568 - &
- [10] EFFECT OF OXYGEN AND VACUUM ANNEALING ON OPTICAL-SPECTRA OF ERBIUM AND PRASEODYMIUM DOPED ALKALINE-EARTH FLUORIDES BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1977, 22 (03): : 351 - 351