methods of producing gears for commercial use including war time data supplement Colvin, Fred H. creator New York McGraw Hill 1943 2nd ed. 370 p. Gears and Gear Cutting Practice (Page-1), Spur Gears and Circular Cutters (Page-55), The Shaping Method of Cutting Gears (Page-103), Helical and Herringbone Gears (Page-118), Hobs and Cutters (Page-142), Bevel Gears (Page-164), Worms and Worm Gears (Page-192), Internal Gears (Page-210), Burnishing, Shaving, Lapping and Grinding Gear Teeth (Page-230), Heat Treatment of Gears (Page-255), Inspection Methods (Page-271). Fred H. Colvin Gear cutting practice 621.944,COL 20230320111357.0