Columbia subject headings:
Harvard subject headings:
Casement, Roger, 1864-1916.
Congo (Democratic Republic)--Description and travel
Congo River Region--Description and travel.
Congo River--Description and travel.
Conrad, Joseph, 1857-1924
Crawford, Daniel, 1870-1926
Hyland, Paul, 1947---Journeys--Congo (Democratic Republic)
Princeton subject headings:
Casement, Roger, 1864-1916.
Congo (Democratic Republic)--Description and travel.
Congo River--Description and travel.
Conrad, Joseph, 1857-1924.
Crawford, Daniel, 1870-1926.
Hyland, Paul--Travel--Congo (Democratic Republic).