Columbia subject headings:
Harvard subject headings:
Singapore--Economic conditions--Congresses.
Singapore--Foreign relations--Congresses.
Singapore--Politics and government--1990---Congresses.
Singapore--Social conditions--Congresses.
Princeton subject headings:
Singapore--Congresses.
Singapore--Economic conditions--Congresses.
Singapore--Foreign relations--Congresses.
Singapore--Politics and government--Congresses.
Singapore--Social conditions--Congresses.