1Thomas Jefferson to Nicolas G. Dufief, 3 May 1812 (Jefferson Papers)
mathematics; books on [index entry]
2Thomas Jefferson to Nicolas G. Dufief, 27 October 1812 (Jefferson Papers)
mathematics; books on [index entry]
3Thomas Jefferson to Nicolas G. Dufief, 25 December 1812 (Jefferson Papers)
mathematics; books on [index entry]