मूल लेख
Limestone quarrying and its effects on environment - A multiagency approach study
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I.Idrissi Alami, A.Rhidouani, M.Zeraouli, A.Haidar, A.Echchelh, M.Addou
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S.Y.Awadalla, A.F.Faten Nour El-Dien, G.G.Mohamed, Amal A.Ahmed