Columbia subject headings:
Infrastructure (Economics)--Cameroon--Douala.
Local transit--Cameroon--Douala.
Transportation and state--Cameroon--Douala.
Urban transportation--Cameroon--Douala.
Urban transportation--Social aspects--Cameroon--Douala.
Harvard subject headings:
Infrastructure (Economics)--Cameroon--Douala.
Local transit--Cameroon--Douala.
Transportation and state--Cameroon--Douala.
Urban transportation--Cameroon--Douala.
Urban transportation--Social aspects--Cameroon--Douala.
Princeton subject headings:
Infrastructure (Economics)--Cameroon--Douala.
Local transit--Cameroon--Douala.
Transportation and state--Cameroon--Douala.
Urban transportation--Cameroon--Douala.
Urban transportation--Social aspects--Cameroon--Douala.