1Thomas Jefferson to Nicolas G. Dufief, 16 September 1816 (Jefferson Papers)
Pestalozzi, Johann Heinrich; educational system of [index entry]
2André Thoüin to Thomas Jefferson, 15 April 1817 (Jefferson Papers)
Pestalozzi, Johann Heinrich; educational system of [index entry]
3Marc Antoine Jullien to Thomas Jefferson, 30 November 1817 (Jefferson Papers)
Pestalozzi, Johann Heinrich; educational system of [index entry]
4Fernagus De Gelone to Thomas Jefferson, 29 June 1820 (Jefferson Papers)
Pestalozzi, Johann Heinrich; educational system of [index entry]
5Fernagus De Gelone to Thomas Jefferson, 5 October 1820 (Jefferson Papers)
Pestalozzi, Johann Heinrich; educational system of [index entry]