Gipsum: Perbedaan antara revisi
Konten dihapus Konten ditambahkan
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Baris 66:
* [http://mineral.galleries.com/minerals/sulfates/gypsum/gypsum.htm Mineral Galleries- Gypsum]
* [http://www.mindat.org/loc-24903.html U.S. and National Gypsum Co. mines, Shoals, Martin Co., Indiana, USA]
* [http://tokogypsumonline.blogspot.com Gypsum]
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