1Thomas Jefferson to John W. Campbell, 3 September 1809 (Jefferson Papers)
Jefferson, Thomas; Writings; Report on Weights and Measures [index entry]
2John Quincy Adams to Thomas Jefferson, 11 October 1817 (Jefferson Papers)
Jefferson, Thomas; Writings; Report on Weights and Measures [index entry]
3Thomas Cooper to Thomas Jefferson, 1 September 1820 (Jefferson Papers)
Jefferson, Thomas; Writings; Report on Weights and Measures [index entry]