The ninth album of Guia Pratico includes the following pieces:
Thesis: Cobb, Susan Schroeder. 1998. Guia pratico for solo piano by Villa-Lobos: stylistic and pedagogic insights into Albums I, VII, and IX. Thesis (D.M.A.)--University of Oklahoma, 1998.
Piano solo
Villa-Lobos, Heitor. 1948. Guia prático, album 9: Six pieces on popular Brazilian children's songs, for piano. New York: Villa-Lobos Music Corp.
Pieces from this album were first played in concerts by Jose Vieira Brando in Rio de Janeiro on November 27, 1939, and November 13, 1941.