^Ferrari, Robert (April 25, 2014).
"Jefferson in the Past". Columbia University Libraries / Information Services.
Archived from the original on September 5, 2015. Retrieved August 3, 2015.
^Ferrari, Robert (April 25, 2014).
"Jefferson in the Past". Columbia University Libraries / Information Services.
Archived from the original on September 5, 2015. Retrieved August 3, 2015.