Columbia subject headings:
Canada--Emigration and immigration--Economic aspects.
Canada--Emigration and immigration--Social aspects.
Emigration and immigration--Economic aspects.
Harvard subject headings:
Canada--Emigration and immigration--Economic aspects.
Canada--Emigration and immigration--Social aspects.
Emigration and immigration--Economic aspects
Princeton subject headings:
Canada--Emigration and immigration--Economic aspects.
Canada--Emigration and immigration--Social aspects.
Emigration and immigration--Economic aspects.