Columbia subject headings:
Art, Brazilian--20th century.
Art, Modern--20th century.
Concrete art--Brazil.
Concrete poetry, Brazilian.
Visual poetry, Brazilian.
Harvard subject headings:
Art, Brazilian--20th century.
Art, Modern--20th century
Concrete art--Brazil.
Concrete poetry, Brazilian.
Visual poetry, Brazilian
Princeton subject headings:
Art, Modern--20th century.
Art--Brazil--São Paulo--20th century.
Concrete art--Brazil.
Concrete poetry, Brazilian.
Visual poetry, Brazilian.