Columbia subject headings:
Agriculture--Belgium.
Belgium--Economic conditions.
Belgium--Social conditions.
Cost and standard of living--Belgium.
Land tenure--Belgium.
Working class--Belgium.
Harvard subject headings:
Agriculture--Belgium.
Belgium--Economic conditions.
Belgium--Social conditions.
Cost and standard of living--Belgium.
Labor and laboring classes--Belgium.
Labor--Belgium.
Land tenure--Belgium.
Working class--Belgium.
Princeton subject headings:
Agriculture--Belgium.
Belgium--Economic conditions.
Belgium--Social conditions.
Cost and standard of living--Belgium.
Labor--Belgium.
Land tenure--Belgium.