Vicious circles and infinity, 1978 portada (George Brecht)

Base de datos LC, 3/9/88: (punto de acceso: Brecht, George)

George Brecht, c2004: página 67 (b. Aug. 27, 1926, New York City)

New York times, sitio web, 16 diciembre 2008: (in obituary published Dec. 15: George Brecht; b. George MacDiarmid, Aug. 27, 1926, New York; changed his last name to Brecht around 1945 while serving in the United States Army in Germany; d. Dec. 5, Cologne, aged 82; core member of Fluxus, the loosely affiliated international group of playful Conceptual artists that emerged in the early 1960s)

Wikipedia, 10 febrero 2015: (George Brecht (August 27, 1926 – December 5, 2008), born George Ellis MacDiarmid, was an American conceptual artist and avant-garde composer as well as a professional chemist who worked as a consultant for companies including Pfizer, Johnson & Johnson, and Mobil Oil. He was a key member of, and influence on, Fluxus, the international group of avant-garde artists centred on George Maciunas, having been involved with the group from the first performances in Wiesbaden 1962 until Maciunas' death in 1978) http://en.wikipedia.org/wiki/George_Brecht