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Here are 4 handbooks on grinding techniques published by Norton Abrasives Co of Worcester, MA
1. Disc Grinding a Production Operation,
2. The ABC of O.D. Grinding, Cylindrical Centerless, 1942
3. Thread Grinding, 1947
4. Grinding Wheel Information & Selection
All 4 were sponsored by Campbell Hardware & Supply Co of Seattle
All in excellent condition
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