Columbia subject headings:
African Americans--Colonization--Africa.
American Colonization Society.
Liberia--Emigration and immigration.
Slave trade.
Harvard subject headings:
African Americans--Colonization--Africa
American Colonization Society
Liberia--Emigration and immigration.
Slave trade
Princeton subject headings:
African Americans--Colonization--Africa.
American Colonization Society.
Liberia--Emigration and immigration.
Slave trade.