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CNIB Instructional Specifications on How to Repair a Perkins Brailler, c.1989Specifications of a Perkins brailler, included within a CNIB training manual on how to repair a brailler at home.
CNIB Instructions for Repairing a Perkins Brailler, Introduction, c.1989A manual intended to help users repair a Perkins brailler, written by Howard Knapman, CNIB volunteer