Barber-Colman 6-10, 6-16, 6-20, 16-16, 16-36 and 16-56 Hobbing Machines: Comprehensive and Detailed Operator's Instruction and Maintenance Manual that is both machine-specific and also covers the general principles of generating gears with hobs. Includes a copy of the maker's Sales, Technical Specification and Accessories Catalogue.

Barber-Colman Number 3 Standard and Precision Hobbing Machines Operator's Instruction and Maintenance Manual.

Barber-Colman Number 1½ Operation and Repair Parts Manual as detailed sectional drawings.

Barber-Colman "Hob Handbooks" - Parts 1 and 2. Complete and Detailed coverage of how to use and maintain hobs.