1Thomas Jefferson to Adamo Fabbroni, Antoine Gouan, Lacepede, Marc Auguste Pictet, and André Thoüin, 6 March 1815 (Jefferson Papers)
Pictet, Marc Auguste; letters to [index entry]
2Thomas Jefferson to Marc Auguste Pictet, 31 January 1816 (Jefferson Papers)
Pictet, Marc Auguste; letters to [index entry]
3Thomas Jefferson to Marc Auguste Pictet, 26 December 1820 (Jefferson Papers)
Pictet, Marc Auguste; letters to [index entry]