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2. Influence of phosphogypsum on hydration of portland cement;Tanaka;Chemical Abstract,1968
3. Gypsum leaching with the removal of soluble salts by inlime filtration;Lewis;Zement-Kalk-Gips,1987
4. The new phosphoplant in Douvarinnear Arrs/France;Baron;Zement-Kalk-Gips,1977
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