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Bureau of Mines / Minerals yearbook 1990
(1990)
Hedrick, James B.
Rare earths: the lanthanides, yttrium, and scandium, pp. 903-922
Page 903
![[page image]](http://images.library.wisc.edu/EcoNatRes/0004/0001/M/0911.gif)
As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright




