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	David Rosenboom (Born 1947) 19IV75 (1975) for two pianos David Rosenboom (piano) J.B. FLOYD (piano). Live recording on April 19, 1975, at Northern Illinois University (USA). (0) Patterns for London (1972) for two pianos David Rosenboom (piano) J.B. FLOYD (piano). Live recording on April 19, 1975, at Northern Illinois University (USA). (0)