Columbia subject headings:
Costa Rica--Social conditions.
El Salvador--Social conditions.
Guatemala--Social conditions.
Marginality, Social--Costa Rica.
Marginality, Social--El Salvador.
Marginality, Social--Guatemala.
Harvard subject headings:
Princeton subject headings:
Costa Rica--Social conditions.
El Salvador--Social conditions.
Guatemala--Social conditions.
Marginality, Social--Costa Rica.
Marginality, Social--El Salvador.
Marginality, Social--Guatemala.