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