Columbia subject headings:
Harvard subject headings:
Kings and rulers in literature--Congresses.
Richard III, King of England, 1452-1485--In literature--Congresses.
Shakespeare, William, 1564-1616--Characters--Kings and rulers--Congresses.
Shakespeare, William, 1564-1616. King Richard III--Congresses.
Princeton subject headings:
Shakespeare, William, 1564-1616. King Richard III.