Links
		EUROGYPSUM Association of European Gypsum Industries
		Bundesverband der Gipsindustrie e.V. Verband der deutschen Gipsindustrie
		Gypsum Association not-for-profit trade association of manufacturers of gypsum board in the U.S. and Canada
		The Economics of Gypsum and Anhydrite Website of the Roskill Information Services Ltd
		Gypsum Statistics and Information Website of the bureau of  the Department of the Interior
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