1Thomas Jefferson to Wilson Cary Nicholas, 16 December 1809 (Jefferson Papers)
2Enclosure: Thomas Jefferson’s Catalogue of Books on Agriculture, [ca. 16 December 1809] (Jefferson Papers)
3José Corrêa da Serra to Thomas Jefferson, 12 February 1816 (Jefferson Papers)
4Enclosure: Thomas Jefferson’s Catalogue of Books on Agriculture, [ca. 3 March 1817] (Jefferson Papers)