Columbia subject headings:
Harvard subject headings:
Belgium--Foreign relations--1914-1951.
Beyens, baron (Eugène-Napoléon), 1855-1934.
Beyens, baron (Eugène-Napoléon), 1855-1934.
Statesmen--Belgium--Biography.
Princeton subject headings:
Belgium--Foreign relations--1914-1951.
Beyens, baron (Eugène-Napoléon), 1855-1934.
Statesmen--Belgium--Biography.