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...View metadata citation and similar papers at core ac uk brought to you by provided digital repository iowa state university retrospective theses dissertations capstones predictive control of a mixer settler extractor separating the rare earths richard charles seemann follow this additional works https lib dr iastate edu rtd part chemical engineering commons recommended dissertation is for free open access it has been accepted inclusion in an authorized administrator more information please contact digirep users was produced from microfilm copy original document while most advanced technological means photograph reproduce have used quality heavily dependent upon submitted following explanation techniques help understand markings or patterns which may appear on reproduction sign target pages apparently lacking photographed missing page s if possible obtain section they are spliced into film along with adjacent necessitated cutting thru image duplicating insure complete continuity when ob...