Columbia subject headings:
Harvard subject headings:
Africa--Emigration and immigration--History--21st century.
Africans--Italy--Sicily--History--21st century.
Drowning victims--Africa--History--21st century.
Illegal immigration--Italy--Sicily--History--21st century.
Italy--Emigration and immigration--History--21st century.
Marine accidents--Mediterranean Sea--History--21st century.
Noncitizens--Italy--Sicily--History--21st century.
Princeton subject headings:
Africa--Emigration and immigration.
Africans--Italy--Social conditions.
Illegal aliens--Italy--Social conditions.
Italy--Emigration and immigration.