Dennis Oppenheim A Sound Enclosed Land Area Milan, Italy: Gabriele Mazzotta Editore and Galeria Lambert, 1969. 22x22x2.5 cm. (map, unfolded: 54x54 cm.) A card box with lid containing 1 folded map, part of the ctiy of Milan + 1 audio magnetic tape (recorded live sounds of a defined area in the city of Milan). Edition of 90 signed, numbered and dated copies.