Peterson, Jonathan (2002). "Tuning in Thirds". American Lutherie. 72 (Winter). Tacoma, Washington: The Guild of American Luthiers: 36–43. ISSN1041-7176. Archived from the original on 21 October 2011. Retrieved 9 October 2012.
Peterson, Jonathan (2002). "Tuning in Thirds". American Lutherie. 72 (Winter). Tacoma, Washington: The Guild of American Luthiers: 36–43. ISSN1041-7176. Archived from the original on 21 October 2011. Retrieved 9 October 2012.
worldcat.org
Peterson, Jonathan (2002). "Tuning in Thirds". American Lutherie. 72 (Winter). Tacoma, Washington: The Guild of American Luthiers: 36–43. ISSN1041-7176. Archived from the original on 21 October 2011. Retrieved 9 October 2012.