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  1. 1
    Recovery of scheelite and byproduct sphalerite from western U.S. tactite ores /
    by Gomes, J. M. (John M.)
    Published 1982
    Government Document Book
  2. 2
    Laboratory investigation of sulfurous acid leaching of kaolin for preparing alumina /
    by Raddatz, A. E. (Andrea E.)
    Published 1981
    Government Document Book
  3. 3
    Preparation of ammonium paratungstate from a sodium tungstate-sodium chloride phase /
    by Raddatz, A. E. (Andrea E.)
    Published 1988
    Government Document Book
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