Columbia subject headings:
Harvard subject headings:
Authors, Chinese--Biography
Cao, Cao, 155-220--Chronology.
Cao, Pi, 187-226--Chronology.
Cao, Zhi, 192-232--Chronology.
Statesmen--China--Chronology.
Princeton subject headings:
Authors, Chinese--Biography.
Cao, Cao, 155-220--Chronology.
Cao, Pi, 187-226--Chronology.
Cao, Zhi, 192-232--Chronology.
Statesmen--China--Chronology.