1. Ultrasonic cutting;Rosenberg,1962
2. Ultrasonic machining and machine tools;Kops,1961
3. Machining intractable materials with ultrasonic and sonic vibrations;Markov,1962
4. Report on ultrasonic machining;Neppiras;Metalworking Production 100,1956
5. Report on ultrasonic machining;Neppiras;Metalworking Production 100,1956