1. High Pressure Coolant Systems Slash Grinding-times;Bartholet;Machine and Tool Blue Book,1978
2. Fundamentals of Industrial Ventilation;Baturin,1972
3. Injection of Helium for Visualization of Air Flow Patterns;Bozhnov;Fluid Mech-Sov. Res-USAO,1976
4. Schlieren Photography — Short Bibliography and Review;Davies;Optics and Laser Technology,1981