What Is Your Piano All About and Allied Subjects compiled by Don U. Kresge Book

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