Columbia subject headings:
Harvard subject headings:
Political persecution--Portugal--Lisbon.
Political prisoners--Portugal--Lisbon.
Polícia Internacional e de Defesa do Estado (Portugal)
State-sponsored terrorism--Portugal--Lisbon.
Princeton subject headings:
Political persecution--Portugal--Lisbon.
Political prisoners--Portugal--Lisbon.
Polícia Internacional e de Defesa do Estado (Portugal)
State-sponsored terrorism--Portugal--Lisbon.