Columbia subject headings:
Harvard subject headings:
Associations, institutions, etc.--El Salvador--Directories.
Charities--El Salvador--Directories.
Economic assistance--El Salvador--Directories.
Non-governmental organizations--El Salvador--Directories.
Princeton subject headings:
Associations, institutions, etc.--El Salvador--Directories.
Charities--El Salvador--Directories.
Economic assistance--El Salvador--Directories.
Non-governmental organizations--El Salvador--Directories.