TY  - BOOK
ED  - United States.
TI  - Man-hours per unit of output in the basic steel industry, 1939-55
T2  - Its Bulletin
AV  - HD8051 .A62 no. 1200
U1  - 338.476691 
PY  - 1956///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Labor productivity
KW  - United States
KW  - Steel industry and trade
ER  -