The Piano Key and Whippen | An Analysis of Their Relationships in Direct Blow Actions
Piano Action Handbook - Compiled by Randy Potter | Spiral Bound Book
Piano Technicians Guide to Field Repairs by Stephen H. Brady, RPT | Piano Technicians Guild
Piano Voicing - Grand Voicing by Franz Rudolf Dietz | English and German
Piano Technicians Guild - Vertical Regulation Curriculum, Student Workbook | A Course of Study In The Regulation of Vertical Pianos by PTG
