Columbia subject headings:
Harvard subject headings:
Liu, Zongyuan, 773-819. Tian dui.
Qu, Yuan, approximately 343 B.C.-approximately 277 B.C. Tian wen.
Princeton subject headings:
Liu, Zongyuan, 773-819. Tian dui.
Qu, Yuan, approximately 343 B.C.-approximately 277 B.C. Tian wen.