⁵³⁸Edwin M. Ripin, et al. “Pianoforte.” Sc. 8. North AmericaTo 1860 Adams-Hoover,C. Grove Music Online. Oxford Music Online. Oxford University Press,
http://www.oxfordmusiconline.com/subscriber/article/grove/music/21631.(accessed November 1, 2015).
⁵³⁹ 9Good, 184,205.
^{540     10}Good,212.
^{541     11}Good,220.
⁵⁴² Edmund M. Fredrick, ‘ERARD, SEBASTIEN,” 4Palmieri, Encyclopedia of the Piano,126.