Columbia subject headings:
Canada--Politics and government--1945-
Willison, John, 1856-1927.
Harvard subject headings:
Canada--Politics and government--1867-1914.
Canada--Politics and government--1914-1945.
Canada--Politics and government--1945-
Willison, John Stephen, Sir, 1856-1927.
Willison, John, 1856-1927.
Princeton subject headings:
Canada--Politics and government--1937-.
Willison, John Stephen, Sir, 1856-1927.