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  • The Halogens Fluorine Chlorine Bromine Iodine

    This chapter discusses the history abundance distribution and extraction of the halogens fluorine chlorine bromine iodine and astatine. The chapter highl

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  • South Africa s coalfields — A 2014 perspective -

    For well over a century and a half coal has played a vital role in South Africa s economy and currently bituminous coal is the primary energy source for domestic

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