1Thomas Jefferson to Nicolas G. Dufief, 31 March 1817 (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, 16 August 1814 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
3Thomas Jefferson to Nicolas G. Dufief, 16 September 1816 (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, 29 September 1810 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
5Thomas Jefferson to Nicolas G. Dufief, 9 February 1817 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
6Thomas 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]
7Thomas 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]
8Thomas Jefferson to Nicolas G. Dufief, 17 May 1816 (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]
9Thomas 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]
10Enclosure: Account with Nicolas G. Dufief, [6 April 1814] (Jefferson Papers)
A New Universal and Pronouncing Dictionary of the French and English Languages (N. G. Dufief) [index entry]