Columbia subject headings:
Brazil--Emigration and immigration--History.
Brazilians--Nigeria--Lagos--History.
Freed persons--Brazil--Social conditions.
Immigrants--Nigeria--Lagos--History.
Nigeria--Emigration and immigration--History.
Harvard subject headings:
Brazil--Emigration and immigration--History.
Brazilians--Nigeria--Lagos--History.
Freed persons--Brazil--Social conditions.
Immigrants--Nigeria--Lagos--History.
Nigeria--Emigration and immigration--History.
Princeton subject headings:
Back to Africa movement.
Freed persons--Brazil.
Freed persons--Nigeria.