1935–1942
United States Geological Survey, 1936
United States Geological Survey, 1937
United States Geological Survey, 1938
United States Geological Survey, 1935
United States Geological Survey, 1941
United States Geological Survey
United States Geological Survey, 1932
United States Geological Survey, 1980
![The Official George Washington Bicentennial Commemorative Medal [obverse]](https://api.nga.gov/iiif/1196749a-3a57-4b0e-abd1-427975c2f6d7/full/843,/0/default.jpg)