Arthur Young (1792). “Travels during the years 1787, 1788, and 1789: undertaken more particularly with a view of ascertaining the cultivation, wealth, resources, and national prosperity of the kingdom of France”, p.37
William J. Clinton “Public Papers of the Presidents of the United States, William J. Clinton, 1993, Bk. 2, August 1 to December 31, 1993”, Government Printing Office