1
Optical spectroscopy of lanthanides : magnetic and hyperfine interactions /
Book
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Table of Contents 
2
Magnetism and electronic correlations in local-moment systems : rare-earth elements and compounds : [190. WE-Heraeus-Seminar] Berlin, 16 - 18 March 98 /
Book
3
Handbook on the physics and chemistry of rare earths. 20.
Book
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