2007-01-032022-02-032007-01-032022-02-03http://hdl.handle.net/11124/5968Figure 10.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.Rights management statement available at: http://library.mines.edu/digital/rights.htmlExplosivesMiningStillImage