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The picture features, from left to right, Mumma, Cage, and Tudor sitting and standing behind electronic music equipment as they adjust parts of the equipment with their hands. On the verso is a news clipping which gives the date and reads: \"Concert Rehearsal - Electronic Style[.] John Cage, center, famed electronic composer, prepares for a concert at the University of Colorado Music Hall. With him are Gordon Mumma, left, whose piece \"Home\" was to be performed, and David Tudor, busy with the intricate connections demanded by the maze of electronic equipment for production.\"\u003c/p\u003e"],"scopecontent_heading_ssm":["Scope and Content"],"scopecontent_tesim":["Black and white photograph of John Cage, Gordon Mumma, and David Tudor at a concert rehearsal, taken July 5, 1968. The picture features, from left to right, Mumma, Cage, and Tudor sitting and standing behind electronic music equipment as they adjust parts of the equipment with their hands. On the verso is a news clipping which gives the date and reads: \"Concert Rehearsal - Electronic Style[.] John Cage, center, famed electronic composer, prepares for a concert at the University of Colorado Music Hall. With him are Gordon Mumma, left, whose piece \"Home\" was to be performed, and David Tudor, busy with the intricate connections demanded by the maze of electronic equipment for production.\""],"userestrict_html_tesm":["\u003cp\u003eThere are no other restrictions on personal use. Permission to publish material from the Photograph of John Cage, Gordon Mumma, and David Tudor at a concert rehearsal must be obtained from Special Collections Research Center, George Mason University Libraries.\u003c/p\u003e"],"userestrict_heading_ssm":["Use Restrictions"],"userestrict_tesim":["There are no other restrictions on personal use. Permission to publish material from the Photograph of John Cage, Gordon Mumma, and David Tudor at a concert rehearsal must be obtained from Special Collections Research Center, George Mason University Libraries."],"abstract_html_tesm":["\u003cabstract id=\"aspace_fd55806ad841789bb1199f051e606be9\" label=\"Abstract\"\u003eBlack and white photograph of John Cage, Gordon Mumma, and David Tudor at a concert rehearsal, taken July 5, 1968. The picture features, from left to right, Gordon Mumma, John Cage, and David Tudor sitting and standing behind electronic music equipment as they adjust parts of the equipment with their hands.\u003c/abstract\u003e"],"abstract_tesim":["Black and white photograph of John Cage, Gordon Mumma, and David Tudor at a concert rehearsal, taken July 5, 1968. 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