Columbia subject headings:
Iran--Foreign relations--20th century--Sources.
Iran--Foreign relations--Pakistan--Sources.
Iran--Relations--Pakistan--Sources.
Pakistan--Foreign relations--20th century--Sources.
Pakistan--Foreign relations--Iran--Sources.
Pakistan--Relations--Iran--Sources.
Harvard subject headings:
Iran--Foreign relations--20th century--Sources.
Iran--Foreign relations--Pakistan--Sources.
Iran--Relations--Pakistan--Sources.
Pakistan--Foreign relations--20th century--Sources.
Pakistan--Foreign relations--Iran--Sources.
Pakistan--Relations--Iran--Sources.
Princeton subject headings:
Iran--Foreign relations--Pakistan--Sources.
Iran--Relations--Pakistan--Sources.
Pakistan--Foreign relations--Iran--Sources.
Pakistan--Relations--Iran--Sources.