TY  - BOOK
AU  - Walker, W. F. 
TI  - Engineering productivity : : Volume I: Tools, machinesand processes
PY  - 1963///
CY  - London : 
PB  - Crosby lockwood, 
KW  - MAQUINAS HERRAMIENTAS
KW  - TALADROS
KW  - FRESADORAS
ER  -