1Nicolas G. Dufief to Thomas Jefferson, 18 September 1810 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
2Thomas Jefferson to Nicolas G. Dufief, 29 September 1810 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
3Nicolas G. Dufief to Thomas Jefferson, 24 February 1811 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
4Thomas Jefferson to Nicolas G. Dufief, 4 August 1811 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
5Nicolas G. Dufief to Thomas Jefferson, 9 August 1811 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
6Thomas Jefferson’s Account with Joseph Milligan, [ca. 16 August 1815] (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
7Thomas Jefferson to Samuel R. Demaree, 12 January 1813 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
8Thomas Jefferson to Nicolas G. Dufief, 24 June 1813 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
9Nicolas G. Dufief to Thomas Jefferson, 10 July 1813 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
10Thomas Jefferson to Nicolas G. Dufief, 22 August 1813 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]