Columbia subject headings:
Afghanistan--Foreign relations--20th century.
Afghanistan--Politics and government--1973-1989.
Afghanistan--Politics and government--1989-2001.
Afghanistan--Politics and government--2001-
Harvard subject headings:
Afghanistan--Foreign relations--20th century.
Afghanistan--Politics and government--1973-1989.
Afghanistan--Politics and government--1989-2001.
Afghanistan--Politics and government--2001-
Princeton subject headings: