Columbia subject headings:
Markets--Nigeria--Ibadan.
Harvard subject headings:
Marketing--Nigeria--Ibadan Region--History--20th century.
Markets--Nigeria--Ibadan.
Rural development--Nigeria--Ibadan Region--History--20th century.
Urban economics--Nigeria--Ibadan Region--History--20th century.
Yoruba (African people)--Economic conditions--Nigeria--Ibadan.
Princeton subject headings: