The Coal Mines; Containing a Description of the Various Systems of Working And Ventilating Mines, Together With a Sketch of the Principal Coal Regions of the Globe, Including Statistics of the Coal Production
The Coal Mines; Containing a Description of the Various Systems of Working And Ventilating Mines, Together With a Sketch of the Principal Coal Regions of the Globe, Including Statistics of the Coal Production
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
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