Columbia subject headings:
Marlowe, Christopher, 1564-1593.
Shakespeare, William, 1564-1616--Authorship.
Harvard subject headings:
Marlowe, Christopher, 1564-1593
Shakespeare, William, 1564-1616--Authorship--Marlowe theory.
Shakespeare, William, 1564-1616--Authorship.
Princeton subject headings:
Marlowe, Christopher, 1564-1593.