1John Adams to Thomas Jefferson, 28 June 1812 (Jefferson Papers)
Adams, John; on Genghis Khan [index entry]
2John Adams to Thomas Jefferson, 26 January 1813 (Jefferson Papers)
Adams, John; on Genghis Khan [index entry]
3John Adams to Thomas Jefferson, 16 July 1814 (Jefferson Papers)
Adams, John; on Genghis Khan [index entry]