Columbia subject headings:
Harvard subject headings:
Baroja, Pío, 1872-1956.
Baroja, Serafín, 1840-1912.
País Vasco (Spain)--Biography.
País Vasco (Spain)--History--19th century
País Vasco (Spain)--History--20th century.
Princeton subject headings:
Baroja family.
Baroja, Pío, 1872-1956.
País Vasco (Spain)--History.
Teachers--Spain.