TY  - BOOK
AU  - Riley V
AU  -  Allen R L
TI  - Interindustry economic studies
T2  - Johns Hopkins university, Operations Research office, bibliographic reference series,4
U1  - X:89P:(B)b4aN5, J5/BB 
PY  - 1955///
CY  - Baltimore
PB  - Johns Hopkins Press        
KW  - Work Study
ER  -