Piano Technicians Guide to Field Repairs by Stephen H. Brady, RPT | Piano Technicians Guild
The Piano Key and Whippen | An Analysis of Their Relationships in Direct Blow Actions
A Guide to Restringing - Piano Stringing Book by John W Travis
Piano Voicing - Grand Voicing by Franz Rudolf Dietz | English and German
Piano Action Handbook - Compiled by Randy Potter | Spiral Bound Book
