Columbia subject headings:
Africa, Southern--Archival resources--Congresses.
Africa, Southern--Library resources--Congresses.
Basler Afrika Bibliographien.
Libraries--Africa, Southern--Special collections--Congresses.
Schlettwein, Carl.
Harvard subject headings:
Africa, Southern--Archival resources--Congresses.
Africa, Southern--Library resources--Congresses.
Basler Afrika Bibliographien.
Libraries--Africa, Southern--Special collections--Congresses.
Schlettwein, Carl.
Princeton subject headings:
Archives--Africa, Southern--Congresses.
Documentation--Africa, Southern--Congresses.
Information services--Africa, Southern--Congresses.
Libraries--Africa, Southern--Congresses.
Schlettwein, Carl--Congresses.