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    Subjects: ...rare-earth elements...
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    ... the historical background of some of the principal groups or elements in the flora of Canada . First edition...
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    ... of 1984. Detectable concentrations were reported for all ten elements. Enrichment factors revealed...
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    by DE Baar, H. J. W.
    Published 1983
    Subjects: ...*RARE EARTH ELEMENTS...
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