Keywords: ncgs monochrome photo border North Carolina Geological Survey, "Economic Papers, No. 15, The Mining Industry in North Carolina during 1907," 1908, by Joseph Hyde Pratt, Plate XIII, facing p. 42. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0393 North Carolina Geological Survey, "Economic Papers, No. 15, The Mining Industry in North Carolina during 1907," 1908, by Joseph Hyde Pratt, Plate XIII, facing p. 42. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0393 |