Authors: White, David. --- Emery, W.B. --- Winchester, Dean E. --- Bowen, C.F. --- Heald, K.C. --- et al. Hopkins, O.B. --- Clark, F.R. --- Lloyd, E.R. --- Mather, K.F. --- Ross, C.S. --- Powers, Sidney --- Robinson, H.M. --- Mills, R. Van A. --- Roundy, P.V. --- Reeves, Frank --- Goldman, M.I. --- Richardson, G. B.
Year: 1922 Publisher: Washington Government Printing Office ; U. S. Geological Survey