Columbia subject headings:
Costa Rica--Economic conditions--Periodicals.
Industries--Costa Rica--Periodicals.
Mines and mineral resources--Costa Rica--Periodicals.
Power resources--Costa Rica--Periodicals.
Harvard subject headings:
Costa Rica. Ministerio de Industria, Energía y Minas--Periodicals.
Energy industries--Costa Rica--Periodicals.
Industries--Costa Rica--Periodicals.
Mineral industries--Costa Rica--Periodicals.
Princeton subject headings: