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Major Gypsum Producers AMERICAN GYPSUM ATLAS BORAL BPB BYUCKSAN CORP CHIYODA GYPSUM CSR ETEX GROUP FELS-WERKE FERMACELL GEORGIA-PACIFIC KEUMKANG KNAUF LAFARGE LAFARGE NORTH AMERICA NATIONAL GYPSUM PABCO GYPSUM PANEL REY SICILGESSO SPA SYNTHETIC MATERIALS TEMPLE-INLAND USG WINSTONE WALLBOARDS YOSHINO GYPSUM