TY  - BOOK
AU  - Krar,Stephen F.
AU  - Gill,Arthur
TI  - CNC: technology and programming 
SN  - 0070233330 
PY  - 1990///
CY  - New York
PB  - Gregg Division, McGraw-Hill
KW  - Machine-tools
KW  - Numerical control
ER  -