Jones, F. D., & Ryffel, H. H. (1961). Gear design simplified: A series of gear-designing charts illustrating by simple diagrams and examples the solutions of practical problems relating to spur gears, straight-tooth bevel gears, spiral-bevel gears, helical gears for parallel shaft drives, helical (spiral) gears for angular drives, heringbone gears, and worm gears (third edition.). Industrial Press.
Chicago Style (17th ed.) CitationJones, Franklin Day, and Henry H. Ryffel. Gear Design Simplified: A Series of Gear-designing Charts Illustrating by Simple Diagrams and Examples the Solutions of Practical Problems Relating to Spur Gears, Straight-tooth Bevel Gears, Spiral-bevel Gears, Helical Gears for Parallel Shaft Drives, Helical (spiral) Gears for Angular Drives, Heringbone Gears, and Worm Gears. third edition. New York, N.Y: Industrial Press, 1961.
MLA (9th ed.) CitationJones, Franklin Day, and Henry H. Ryffel. Gear Design Simplified: A Series of Gear-designing Charts Illustrating by Simple Diagrams and Examples the Solutions of Practical Problems Relating to Spur Gears, Straight-tooth Bevel Gears, Spiral-bevel Gears, Helical Gears for Parallel Shaft Drives, Helical (spiral) Gears for Angular Drives, Heringbone Gears, and Worm Gears. third edition. Industrial Press, 1961.