41John Adams to Thomas Jefferson, 29 January 1819 (Jefferson Papers)
political economy; works on [index entry]
42Joseph Milligan to Thomas Jefferson, 17 February 1819 (first letter) (Jefferson Papers)
political economy; works on [index entry]
43John Adams to Thomas Jefferson, 24 February 1819 (Jefferson Papers)
political economy; works on [index entry]
44John Adams to Thomas Jefferson, 2 March 1819 (Jefferson Papers)
political economy; works on [index entry]
45Joseph Milligan to Thomas Jefferson, 3 March 1819 (Jefferson Papers)
political economy; works on [index entry]
46Destutt de Tracy to Thomas Jefferson, 10 March 1819 (Jefferson Papers)
political economy; works on [index entry]
47John Adams to Thomas Jefferson, 2 April 1819 (Jefferson Papers)
political economy; works on [index entry]
48Destutt de Tracy to Thomas Jefferson, 24 November 1820 (Jefferson Papers)
political economy; works on [index entry]
49Joseph Milligan to Thomas Jefferson, 27 November 1820 (Jefferson Papers)
political economy; works on [index entry]