UNITED STATES FOREST SERVICE: Forest Atlas of the National Forests of the Unites States
- NA = National Archives;
- LC = Library of Congress, Geography and Map Division;
- YA = Yale School of Forestry Library;
- NAL = National Agricultural Library
NOTE: All folios measure 54 x 46 cm. and are similar in format to the folios of the Geologic Atlas of the United States issued by the U.S. Geological Survey between 1894 and 1945. Each forestatlas sheet covers six townships or less. They were issued unbound in heavy cardstock paper folders. Folders include the title information and sheet arrangement diagram.