Columbia subject headings:
Nigeria--Social conditions--Case studies.
Okafor, Christopher Nweke, 1898-1944.
Harvard subject headings:
Nigeria--Social conditions--Case studies.
Okafor, Christopher Nweke, 1898-1944.
Princeton subject headings:
Case studies.
Nigeria--Social conditions--Case studies.
Okafor, Christopher Nweke, 1898-1944.