1Destutt de Tracy to Thomas Jefferson, 21 October 1811 (Jefferson Papers)
Logique (Destutt de Tracy) [index entry]
2Destutt de Tracy to Thomas Jefferson, 4 February 1816 (Jefferson Papers)
Logique (Destutt de Tracy) [index entry]
3Destutt de Tracy to Thomas Jefferson, 22 February 1821 (Jefferson Papers)
Logique (Destutt de Tracy) [index entry]