Columbia subject headings:
Black people--Diseases--America--History.
Health and race--America--History.
Slavery--America--Social conditions.
Harvard subject headings:
Black people--Diseases--America--History.
Health and race--America--History.
Slaves--America--Social conditions.
Princeton subject headings:
Black people--Diseases--America--History.
Health and race--America--History.
Slaves--America--Social conditions--History.