^Gillispie, Charles Coulston (1983). The Montgolfier Brothers and the Invention of Aviation, 1783-1784. Princeton University Press. p. 21.
ISBN0-691-08321-5.
^Gillispie, Charles Coulston (1983). The Montgolfier Brothers and the Invention of Aviation, 1783-1784. Princeton University Press. p. 21.
ISBN0-691-08321-5.