Authors: State by State (sorted by popularity)
- Girl Scouts of the United States of America - 580 downloads
- United States. Army. Corps of Engineers. Manhattan District - 542 downloads
- United States. Federal Bureau of Investigation - 536 downloads
- United States. Department of the Interior - 532 downloads
- Geological Survey (U.S.) - 524 downloads
- Washington, George 1732-1799 510 downloads
- Ohio State University. Biological Club - 488 downloads
- United States. Army. Signal Corps - 463 downloads
- Cleveland, Grover 1837-1908 444 downloads
- United States. Office of Chief of Counsel for the Prosecution of Axis Criminality - 413 downloads
- United States. War Department. General Staff - 395 downloads
- United States. Army. American Expeditionary Forces - 393 downloads
- Illinois State Geological Survey - 344 downloads
- Harrison, Benjamin 1833-1901 328 downloads
- United States. Council of National Defense. Highways Transport Committee - 322 downloads
- United States. Bureau of the Census - 313 downloads
- United States. Agricultural Research Service. Human Nutrition Research Division - 299 downloads
- United States. Bureau of Animal Industry - 293 downloads
- McKinley, William 1843-1901 274 downloads
- Coolidge, Calvin 1872-1933 263 downloads
- Museum of History and Technology (U.S.) - 260 downloads
- United States Food Administration - 258 downloads
- Federal Writers' Project of the Works Progress Administration for the State of North Dakota - 248 downloads
- United States. Public Health Service - 244 downloads
- United States. Agricultural Research Service. Consumer and Food Economics Research Division - 243 downloads