Columbia subject headings:
Ostrogorski, M. (Moisei), 1854-1919.
Political parties--Philosophy--History--19th century.
Political parties--Philosophy--History--20th century.
Harvard subject headings:
Ostrogorski, M. (Moisei), 1854-1919.
Political parties--Philosophy--History--19th century.
Political parties--Philosophy--History--20th century.
Princeton subject headings:
Ostrogorski, M. (Moisei), 1854-1919.
Political parties--Philosophy--History--19th century.
Political parties--Philosophy--History--20th century.