Columbia subject headings:
Colonization--History.
Race relations--History.
Racism--History.
Slave trade--History.
Slavery--History.
Harvard subject headings:
Colonization--History
Race relations--History
Racism--History
Slave trade--History
Slavery--History
Princeton subject headings:
Colonization--History.
Race relations--History.
Racism--History.
Slave trade--History.
Slavery--History.