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INFRARED QUANTUM COUNTER ACTION IN HO DOPED FLUORIDE LATTICES
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INFRA-RED QUANTUM COUNTER ACTION IN DY DOPED CAF2 AND SRF2
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BROWN MR, 1966, IEEE J QUANTUM ELECT, VQE 2, pR51
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SOME ASPECTS OF INFRA-RED QUANTUM COUNTER ACTION IN ER-DOPED SRF2
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CROSSWHITE HM, 1966, OPTICAL PROPERTIE ED, P485
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THE SPECTRA OF THE DOUBLY AND TRIPLY IONIZED RARE EARTHS
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