Columbia subject headings:
Entrepreneurship--Case studies.
Nigeria--Commerce--Case studies.
Yoruba (African people)--Economic conditions.
Harvard subject headings:
Entrepreneurship--Case studies
Nigeria--Commerce--Case studies.
Yoruba (African people)--Economic conditions.
Princeton subject headings:
Case studies.
Entrepreneurship--Case studies.
Nigeria--Commerce--Case studies.
Yoruba (African people)--Economic conditions.