Columbia subject headings:
Canada--Emigration and immigration--Government policy--History--20th century.
Deportation--Canada--History--20th century.
Harvard subject headings:
Canada--Emigration and immigration--Government policy--History.
Deportation--Canada--History.
Princeton subject headings:
Canada--Emigration and immigration--Government policy--History--20th century.
Deportation--Canada--History--20th century.