Columbia subject headings:
Harvard subject headings:
Costa Rica--Boundaries--Nicaragua.
Costa Rica--Emigration and immigration.
Costa Rica--Foreign economic relations--Nicaragua.
Nicaragua--Boundaries--Costa Rica.
Nicaragua--Emigration and immigration.
Nicaragua--Foreign economic relations--Costa Rica.
Princeton subject headings:
Costa Rica--Boundaries--Nicaragua.
Costa Rica--Emigration and immigration.
Costa Rica--Foreign economic relations--Nicaragua.
Nicaragua--Boundaries--Costa Rica.
Nicaragua--Emigration and immigration.
Nicaragua--Foreign economic relations--Costa Rica.