United States. Forest Service1 map : color; 27 x 40 cm, on sheet 61 x 46 cmScale approximately 1:12 000 000 (W 125°--W 67°/N 49°--N 24°). ; Includes 6 insets (Alaska, Puerto Rico, and 4 Hawaiian Islands), 'General description of the forest regions,' and list of 'Principal trees of the forest regions.'; 'M-5154.' ; Rev. July 1937.9980806271502441ark:/81985/n29884n42United States Department of Agriculture, Forest ServicePublicForests and forestryForest regions of the United States : listing the principal trees of each regionMapsUnited States1938Northwestern University