Columbia subject headings:
Asia, Central--Foreign relations--China--Sources.
Asia, Central--History--Sources.
China--Foreign relations--Asia, Central--Sources.
China--History--Tang dynasty, 618-907--Sources.
Harvard subject headings:
Asia, Central--Foreign relations--China--Sources.
Asia, Central--Historical geography--Sources.
Asia, Central--History--Sources.
China--Foreign relations--Asia, Central--Sources.
China--History--Tang dynasty, 618-907--Sources.
Princeton subject headings:
Asia, Central--Historical geography--Sources.
Asia, Central--History--Sources.
China--History--T'ang dynasty, 618-907--Sources.