Columbia subject headings:
Americans--Africa--History--Sources.
Archives--United States--Catalogs.
Missions--Africa--History--Sources.
Harvard subject headings:
Americans--Africa--History--Sources.
Archives--United States--Catalogs
Missions, American--Africa--History--Sources.
Missions--Africa--History--Sources.
Princeton subject headings:
Americans in Africa--History--Sources.
Archives--United States--Catalogs.
Catalogs.
Missions--Africa--History--Sources.