Columbia subject headings:
Music--Belgium--Liège--18th century.
Music--Belgium--Liège--19th century.
Theater--Belgium--Liège--18th century.
Theater--Belgium--Liège--19th century.
Harvard subject headings:
Hamal, Henri, 1744-1820.
Music--Belgium--Liège--18th century--History and criticism.
Music--Belgium--Liège--18th century.
Music--Belgium--Liège--19th century--History and criticism.
Music--Belgium--Liège--19th century.
Theater--Belgium--Liège--18th century.
Theater--Belgium--Liège--19th century.
Theater--Belgium--Liège--History--18th century.
Theater--Belgium--Liège--History--19th century.
Princeton subject headings: