TY  - BOOK
AU  - INTERNATIONAL LABOUR OFFICE
ED  - INTERNATIONAL LABOUR OFFICE
TI  - Methods of labour productivity statistics
T2  - Studies and reports;no.18
U1  - "X:9.1.N51s, J1/UN" 
PY  - 1951///
CY  - Geneva
PB  - ILO       
N1  - Appendix: 124-136P
ER  -