TY  - BOOK
AU  - Aft,Lawrence S.
TI  - Productivity measurement and improvement / 
SN  - 0137287593
U1  - 658.51 
PY  - 1992///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Time study
KW  - Motion study
KW  - Industrial productivity
N1  - Bibliography : p.382-388
ER  -