Columbia subject headings:
Harvard subject headings:
Henry IV, King of England, 1367-1413--In literature.
Henry IV, King of England, 1367-1413. in fiction, drama, poetry, etc.
Shakespeare, William, 1564-1616. King Henry IV
Shakespeare, William, 1564-1616. King Henry IV. Part 1.
Shakespeare, William, 1564-1616. King Henry IV. Part 2.
Princeton subject headings:
Henry IV, King of England, 1367-1413--In literature.
Shakespeare, William, 1564-1616. King Henry IV.