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Annual meeting and technical conference of the Numerical Control Society (12th : 1975 )：NC/CAM Expo` 75-Progress through goverment, education and industry cooperation
Annual meeting and technical conference of the Numerical Control Society.Lake,1975.
Numerical Control Society.Technical Conference of the Numerical control Society ( 14th : 1977 : Pittsburg, Penn )：NC-from the user`s point of view : proceedings of the 13th Annual Meeting and Technical Conference of the Numerical control Society, Mar. 13-16, 1977, Pittsburg, Penn.Ill.,1977.
Technical Conference of the Numerical control Society ( 14th : 1977 : Pittsburg, Penn )：NC-from the user`s point of view : proceedings of the 13th Annual Meeting and Technical Conference of the Numerical control Society, Mar. 13-16, 1977, Pittsburg, Penn
