"Versatile Vanguard Vectors: 

from Visible Voices to Virtual Vortices in the Vamps, Versions, and Voyages of Brazilian Concrete Poetry" 

Charles A. Perrone

1-  Covers of Mendes "com som sem som"

mendes front  mendes back

2-  Contents of cassette tape of MPB-PC

tc k7

3-  pages of "visible voices"

vv 1  vv2

4-  lyric sheet of Belchior 1973

bel  bel 2

5-  corona "avalanche"rick

6-  makely roda  makely