1James Ronaldson to Thomas Jefferson, 5 March 1809 (Jefferson Papers)
2Enclosure: Thomas Jefferson’s Catalogue of Books on Agriculture, [ca. 16 December 1809] (Jefferson Papers)
3John Adlum to Thomas Jefferson, 13 March 1810 (Jefferson Papers)
4Enclosure: Thomas Jefferson’s Catalogue of Books on Agriculture, [ca. 3 March 1817] (Jefferson Papers)