Columbia subject headings:
Education--Brazil--History--20th century.
Latin America--History--20th century.
Harvard subject headings:
Education--Brazil--History--20th century
Latin America--History--20th century.
Princeton subject headings:
Education, Elementary--Argentina--History--20th century.
Education,Elementary--Brazil--History--20th century.
Reading (Elementary)--Argentina--History--20th century.
Reading (Elementary)--Brazil--History--20th century.