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Bureau of Mines / Minerals yearbook 1992
(1992)
Hedrick, James B.
Rare earths: the lanthanides, yttrium, and scandium, pp. 1035-1061 ff.
Page 1035
![[page image]](http://images.library.wisc.edu/EcoNatRes/0002/0001/M/1043.gif)
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