Letterman, William books & textbook
John Cage: 4'33''– Sounds Like Silence: Silence Today
Daniels, Dieter Arns, Inke Daniels, Dieter Arns, Inke LaBelle, Brandon Toop, David Schmidt, Dörte Schröder, Julia H. Theben, Jan Cage, John Bormann, Hans-Friedrich Letterman, William Gann, Kyle Joseph, Branden
Spector Books /2018-06-26 Paperback / 280 Pages
isbn-10: 3940064416 / isbn-13: 9783940064417
Christ All And In All (1911)
Kessinger Publishing /2010-09-10 Paperback / 142 Pages
isbn-10: 1165900203 / isbn-13: 9781165900206
