1.
Design and Application of the Worm Gear
by Crosher, William P.
ISBN: 9780791801789
List Price: $80.00
2.
A Gear Chronology: Significant Events and Dates Affecting Gear Development
by William P. Crosher
ISBN: 9781499071146
List Price: $19.99
3.
A Gear Chronology: Significant Events and Dates Affecting Gear Development
by William P. Crosher
ISBN: 9781499071153
List Price: $29.99