Columbia subject headings:
Costa Rica. Ministerio de Obras Públicas y Transportes--Periodicals.
Public works--Costa Rica--Planning--Periodicals.
Transportation--Planning--Costa Rica--Periodicals.
Harvard subject headings:
Costa Rica. Ministerio de Obras Públicas y Transportes--Periodicals.
Public works--Costa Rica--Planning--Periodicals.
Transportation--Costa Rica--Planning--Periodicals.
Princeton subject headings: