1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 12 June 1809 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
2James Madison to Thomas Jefferson, 6 October 1809 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
3James Madison to Thomas Jefferson, 30 October 1809 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
4Isaac A. Coles to Thomas Jefferson, 12 November 1809 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
5Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 31 March 1811 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
6Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 4 July 1811 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]
7Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 5 September 1811 (Jefferson Papers)
Turgot, Anne Robert Jacques; Oeuvres [index entry]