TY  - BOOK
AU  - Chambers, Harold. L
AU  - 
TI  - Drafting and Manuel Programming for Numerical Control
U1  - 621.9: 681.3.041 
PY  - 1980///
CY  - New Jersey
PB  - Prentice-Hall of India
N1  -  Bibliog p. 473- 475
ER  -