TY  - BOOK
TI  - Year book of labour statistics =: Annuaire des statistiques du travail = Anuario de estadâisticas del trabajo
SN  - 922006426X
PY  - 1990///.
CY  - Geneva
PB  - International Labour Office
KW  - Working class
KW  - Statistics
N1  - At head of title: 1989-90.
ER  -