Columbia subject headings:
Agriculture--Economic aspects--Senegal--Diourbel (Region)
Farm income--Senegal--Diourbel (Region)
Income--Senegal--Diourbel (Region)
Harvard subject headings:
Agriculture--Economic aspects--Senegal--Diourbel (Region)
Farm income--Senegal--Diourbel (Region)
Income--Senegal--Diourbel (Region)
Princeton subject headings: