Keywords: ncgs outdoor 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. 16. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0357_a 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. 16. digital.ncdcr.gov/cdm/compoundobject/collection/p16062col... economicpapers1215unse_0357_a |