![Occupational safety and health / Hermann Eckstein / John Hays Hammond / School of mines / Jules Porgès / Coal mining / De Beers / Danie G. Krige / Gardner F. Williams / Mining / Mining engineers / Randlords Occupational safety and health / Hermann Eckstein / John Hays Hammond / School of mines / Jules Porgès / Coal mining / De Beers / Danie G. Krige / Gardner F. Williams / Mining / Mining engineers / Randlords](https://www.pdfsearch.io/img/89c402f09eb061539f92970175afda2b.jpg) Date: 2012-05-02 10:26:48Occupational safety and health Hermann Eckstein John Hays Hammond School of mines Jules Porgès Coal mining De Beers Danie G. Krige Gardner F. Williams Mining Mining engineers Randlords | | “American Mining Engineers in the Kimberley and Witwatersrand Mines circa the turn of the 20th Century” By Dr Morley Nkosi
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