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Supertopics:
Rare Earth Elements (rare earth metals)

Particular Rare Earth Elements

Subtopics:
webUS Department of Energy2010-12-01
webKeith BradsherNew York Times2009-12-25
webSimon ParryDaily Mail2011-01-26
webUS Department of Energy2010-12-01
webKeith BradsherNew York Times2009-12-25