Villa-Lobos's writings during the presidency of Getúlio Vargas (1930–1945) include propaganda for Brazilian nationhood ("brasilidade"), and teaching and theoretical works. His "Guia Prático" ran to 11volumes, "Solfejos" (two volumes, 1942 and 1946) contained vocal exercises, and "Canto Orfeônico" (1940 and 1950) contained patriotic songs for schools and for civic occasions. His music for the film "O Descobrimento do Brasil" (The Discovery of Brazil) of 1936, which included versions of earlier compositions, was arranged into orchestral suites, and includes a depiction of the first mass in Brazil in a setting for double choir.