1. Ultrasonic carving machine;Life,1952
2. New method machines: sintered carbides, sintered borides, hardened tool steels;Cohan;J. Metals,1951
3. Hard, brittle materials machined using ultrasonic vibrations;Kelley;Materials & Methods,1951
4. Acoustics. Student’s physics;Wood,1941
5. On the effects of magnetism upon the dimensions of iron and steel bars;Joule;London Phil. Mag.,1847