1Nicolas G. Dufief to Thomas Jefferson, 5 November 1812 (Jefferson Papers)
mathematics; books on [index entry]
2Nicolas G. Dufief to Thomas Jefferson, 4 January 1813 (Jefferson Papers)
mathematics; books on [index entry]
3Enclosure: Nicolas G. Dufief’s Account with Thomas Jefferson for Books, [ca. 31 May 1813] (Jefferson Papers)
mathematics; books on [index entry]
4Enclosure: Account with Nicolas G. Dufief, [6 April 1814] (Jefferson Papers)
mathematics; books on [index entry]