TY  - BOOK
AU  - Kelly,Mary Lavina
TI  - Productivity trends in selected industries: indexes through 1950
T2  - U. S. Bureau of Labor Statistics.  Bulletin
AV  - HD8051 .A62 no. 1046
PY  - 1951///]
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Labor productivity
KW  - United States
ER  -