This comprehensive book by Richard S. Patterson and Richardson Dougall was published in 1976 by the Office of the Historian, Bureau of Public Affairs, Department of State, under the auspices of the American Revolution Bicentennial Administration. (681 pages, 92 illustrations)
The U.S. Department of State provides an 18-page pamphlet (PDF file). Go to www.state.gov/r/pa/ei/rls/dos/9087.htm and click on: "Great Seal and its history."
Front Page