Numerical Control Society.Technical Conference of the NCS ( 15th : 1978 : Chicago )：Numerical Control Society Annual Meeting & Technical Conference, Chicago, Apr. 9-12, 1978.s. n. ],n. d..
Numerical Control Society.NCS Annual Meeting and Technical Conference ( 16th : 1979 : Los Angeles)：New horizons for manufacturing: proceedings of the 16th Annual Meeting and Technical Conference, Los Angeles 1979.s. n.],n. d..
NCS Annual Meeting and Technical Conference ( 16th : 1979 : Los Angeles)：New horizons for manufacturing: proceedings of the 16th Annual Meeting and Technical Conference, Los Angeles 1979
