Columbia subject headings:
Baroja, Pío, 1872-1956--Criticism and interpretation.
Harvard subject headings:
Baroja, Pío, 1872-1956--Contemporaries.
Baroja, Pío, 1872-1956--Knowledge--Psychology.
Baroja, Pío, 1872-1956--Philosophy.
Psychology in literature.
Princeton subject headings: