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