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The Structure of the Acoustic Guitar:The rule of strings and pitch - Musical Instrument Guide - Yamaha Corporation
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D'Addario Pro-Winder - Guitar String Winder, Guitar String Cutter, Guitar Bridge Pin Puller - Ultimate Ergonomic All in One Guitar Tool for Restringing - Black : Amazon.ca: Musical Instruments, Stage & Studio
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The Structure of the Acoustic Guitar:The rule of strings and pitch - Musical Instrument Guide - Yamaha Corporation
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