Columbia subject headings:
Pfeffel, Gottlieb Konrad, 1736-1809--Congresses.
Harvard subject headings:
Pfeffel, Gottlieb Konrad, 1736-1809--Appreciation--Congresses.
Pfeffel, Gottlieb Konrad, 1736-1809--Criticism and interpretation--Congresses.
Princeton subject headings:
Pfeffel, Gottlieb Konrad, 1736-1809--Congresses.