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