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  • Weisz, H. S.; Scheffler, B.; Neely, L. W.
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    Method for Rendering Cellulosic Materials Flame Retardant.
    M. Lowenstein and Sons, Inc., New York, NY
    U.S. Patent 3,644,140
    U.S. Patent 3,644,140
    April 17, 1970
    6 p.