TY  - BOOK
ED  - United States.
TI  - Trends in output per man-hour in the private economy, 1909-1958
T2  - Its Bulletin,
AV  - HD8051 .A62 no. 1249
PY  - 1959///
CY  - Washington
PB  - U.S. Bureau of Labor Statistics
KW  - Labor productivity
ER  -