Tips from a piano technician : zither pins : coiled vs. overlapping, should you even care?
Gregory, Sheffey
Tips from a piano technician : zither pins : coiled vs. overlapping, should you even care? / Sheffey Gregory, Dan Landrum - 2007. - p. 14-16 : ill.
Periodical article.
Dulcimer players news , 33 no. 4 (Fall 2007), p. 14-16