Columbia subject headings:
Belgium--Statistics, Vital.
Cohort analysis.
Mortality--Belgium--Statistics.
Harvard subject headings:
Belgium--Statistics, Vital--History.
Belgium--Statistics, Vital.
Cohort analysis.
Mortality--Belgium--History.
Mortality--Belgium--Tables.
Princeton subject headings:
Belgium--Statistics, Vital.
Cohort analysis.
Mortality--Belgium--Statistics.