Columbia subject headings:
Ernst, Paul, 1866-1933--Criticism and interpretation.
Tragedy--History and criticism.
Tragic, The, in literature.
Harvard subject headings:
Ernst, Paul, 1866-1933--Criticism and interpretation.
Tragedy--History and criticism.
Tragic, The, in literature.
Princeton subject headings:
Ernst, Paul, 1866-1933--Criticism and interpretation.
Tragedy--History and criticism.