Shows soil types classification by colors and symbols. "Field Operations, Bureau of Soils, 1907." "Julius Bien & Co. Lith. N.Y." Imprint: [Washington, D.C.?] : The Bureau, [1907?] Dimensions: 51 x 50 cm; Scale: 1:63,360 Coordinates: W0862000 W0855700 N0395600 N0393800