Columbia subject headings:
Harvard subject headings:
Military art and science--History--Medieval, 500-1500
Political science--History--To 1500
Teodoro, Paleologi, 1291-1338.
Princeton subject headings:
Military art and science--History--Medieval, 500-1500.
Political science--History--To 1500.
Teodoro, Paleologi, 1291-1338.