I'm not sure if the De Marinis question has been answered, in case it wasn't: "The lecture of Comrade Stalin at the Extraordinary 8th Plenary Congress..." can be found at Leonardo Music Journal CD, Volume 8 (Ghosts and Monsters: Technology and Personality in Contemporary Music), along with some great pieces by Ashley, Cage, Lucier, Hirsch, Butzmann, Cardew, etc.