Columbia subject headings:
Fierros, Dionisio, 1827-1894--Criticism and interpretation.
Photography--Spain--History--19th century.
Portraits, Spanish--19th century.
Harvard subject headings:
Fierros, Dionisio, 1827-1894--Criticism and interpretation.
Photography--Spain--History--19th century.
Portraits, Spanish--19th century.
Princeton subject headings:
Fierros, Dionisio, 1827-1894--Criticism and interpretation.
Photography--Spain--History--19th century.
Portraits, Spanish--19th century.