Map of the United States showing the Relative Average Density of Existing Forests. Prepared under the direction of C.S. Sargent, Special Agent. (inset) Aleutian Islands. Julius Bien & Co. lith. N.Y. Compiled under the Direction of Henry Gannett, E.M. Harry King, Draughtsman. https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~221529~5505497
