Columbia subject headings:
Pessoa, Fernando, 1888-1935--Criticism and interpretation.
Yeats, W. B. (William Butler), 1865-1939--Criticism and interpretation.
Harvard subject headings:
Comparative literature--English and Portuguese.
Comparative literature--Portuguese and English.
Pessoa, Fernando, 1888-1935--Criticism and interpretation.
Yeats, W. B. (William Butler), 1865-1939--Criticism and interpretation.
Princeton subject headings:
Pessoa, Fernando, 1888-1935--Literary style.
Poetics--History--20th century.
Yeats, W. B. (William Butler), 1865-1939--Literary style.