Environmental problems associated with mining of bentonite clay deposits at boa vista, paraiba, brazil
C M M Silva Sérgio Médici de Eston 1948-; Eduardo Camilher Damasceno 1940-2005; International Symposium on Mine Planning and Equipment Selection (4. 1995 Calgary)
Mine Planning and Equipment Selection 1995: Proceedings Rotterdam : Balkema, 1995Rotterdam Balkema 1995
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