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1.
Screw Thread Cutting - Machinery's Reference Series - Number 32 by Erik Oberg, A L Valentine, ... ISBN: 9781528709095 List Price: $14.99
2.
Screw Thread Tools and Gages - Machinery's Reference Series - Number 31 by Erik Oberg, E A Johnson, Jo... ISBN: 9781528709088 List Price: $14.99