2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/6036Date scanned: 2002-7-19.USBM #54129; Text on verso, "Expl. Inv. School".Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.The image shows over 50 men in suits grouped in front of a building entrance, probably to illustrate their participation in the School.Rights management statement available at: http://library.mines.edu/digital/rights.htmlEngineeringExplosivesStillImage