Columbia subject headings:
Poh, Soo Kai.
Political prisoners--Singapore--Biography.
Singapore--History.
Singapore--Politics and government.
Harvard subject headings:
Poh, Soo Kai.
Political prisoners--Singapore--Biography.
Singapore--History
Singapore--Politics and government
Princeton subject headings:
Poh, Soo Kai.
Political prisoners--Singapore--Biography.
Singapore--History.
Singapore--Politics and government.