John Cage - François Morellet - Milan Grygar : Otevrená forma. (Praha : Prague City Gallery, 1993)
John Cage - François Morellet - Milan Grygar : Otevrená forma / Forme ouverte / Open Form, Galerie hlavniho mesta, Prahy (City Gallery), 15. prosinec (december) 1993 - 23. leden (January) 1994
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Keywords: Cage, John; Morellet, François; Grygar, Milan