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(2019, December 01). Ball, Graham Thalben, (Johnny), (born 23 May 1938), writer, lecturer and television presenter; mathematical enthuser, since 1978. WHO'S WHO & WHO WAS WHO. Retrieved 8 Aug. 2020, from https://www.ukwhoswho.com/view/10.1093/ww/9780199540884.001.0001/ww-9780199540884-e-292278.