21George Washington Jeffreys to Thomas Jefferson, 8 April 1817 (Jefferson Papers)
agriculture; books on [index entry]
22John Vaughan to Thomas Jefferson, 2 June 1817 (Jefferson Papers)
agriculture; books on [index entry]
23Joseph C. Cabell to Thomas Jefferson, 14 October 1817 (Jefferson Papers)
agriculture; books on [index entry]
24John Vaughan to Thomas Jefferson, 14 October 1817 (Jefferson Papers)
agriculture; books on [index entry]
25Enclosure: Invoice of Books for Thomas Jefferson Purchased from de Bure Frères, [ca. 23 October] 1817 (Jefferson Papers)
agriculture; books on [index entry]
26James Madison to Thomas Jefferson, 12 February 1819 (Jefferson Papers)
agriculture; books on [index entry]
27Thomas Jefferson to James Madison, 19 February 1819 (Jefferson Papers)
agriculture; books on [index entry]
28Thomas Cooper to Thomas Jefferson, 11 April 1819 (Jefferson Papers)
agriculture; books on [index entry]
29Thomas Jefferson to John Laval, 11 April 1819 (Jefferson Papers)
agriculture; books on [index entry]
30John Laval to Thomas Jefferson, 19 April 1819 (Jefferson Papers)
agriculture; books on [index entry]