TY  - BOOK
ED  - 
TI  - Work Study In Mines
U1  - 622.334 WOR 
PY  - 1979///
CY  - London
PB  - National Coal Board
KW  - Mine management
KW  - Great Britain
KW  - Work measurement
N1  - Includes Appendix 1 ( p. 270 - 274 )
ER  -