TY  - BOOK
AU  - Horton Susan
AU  -  King Timothy
TI  - Labour productivity :  Untour d' Horizon
T2  - World Bank Staff Working paper. 497
U1  - "X:9-89P.1.N7, M1/UN" 
PY  - 1981///
CY  - Washington
PB  - World Bank      
KW  - Labour Economics
ER  -