Columbia subject headings:
Agriculture--Economic aspects--Yemen (Republic)--Case studies.
Yemen (Republic)--Economic conditions--Case studies.
Harvard subject headings:
Agriculture--Economic aspects--Yemen (Republic)
Farm produce--Yemen (Republic)--Marketing.
Yemen (Republic)--Economic conditions.
Yemen (Republic)--Rural conditions.
Princeton subject headings:
Agriculture--Economic aspects--Yemen.
Farm produce--Yemen--Marketing.
Yemen--Economic conditions.
Yemen--Rural conditions.