TY  - BOOK
AU  - Sadler,George E.
ED  - United States.
TI  - Productivity program of the Bureau of Labor Statistics,
AV  - HF57 .U53 1950
U1  - 338.01 
PY  - 1950///
CY  - Washington
KW  - United States
KW  - Bureau of Labor Statistics
KW  - Labor productivity
ER  -