Columbia subject headings:
Beckmann, Johann, 1739-1811--Congresses.
Germany--Social policy--18th century--Congresses.
Harvard subject headings:
Beckmann, Johann, 1739-1811
Germany--Social policy--18th century.
Princeton subject headings:
Beckmann, Johann, 1739-1811--Congresses.
Germany--Social policy--History--18th century--Congresses.