Columbia subject headings:
Agriculture and state--Ontario--History--20th century.
Drury, E. C. (Ernest Charles), 1878-1968.
Ontario--Politics and government.
Prime ministers--Ontario--Biography.
Harvard subject headings:
Agriculture and state--Ontario--History--20th century.
Drury, E. C. (Ernest Charles), 1878-1968.
Ontario--Politics and government.
Prime ministers--Ontario--Biography.
Princeton subject headings:
Drury, E. C. (Ernest Charles), 1878-1968.
Ontario--Politics and government--1905-1919.
Prime ministers--Ontario--Biography.