Pearce, Joseph (1866). Violins and Violin Makers: Biographical Dictionary of the Great Italian Artistes, Their Followers and Imitators, to the Present Time. With Essays on Important Subjects Connected with the Violin. London: Longman and co. Print. "Internet Archive"
genealogybank.com
Peterffy, Ernest. Music and Youth, April 1926, cited in The Rockford Register-Gazette, May 17, 1926. Helen Fish, "Klotz First of Violin Makers of Mittenwald", p. 15. "Search Klotz Violin Illinois"
