1685-1750 1866-1924 1873-1950 1882-1944 1895-1963 1896-1950 20thcentury aesthetics arthurstanley bio-bibliography biography busoni composers correspondence correspondencereger correspondencestraube criticismandinterpretationreger discographyreger eddington edwardarthur ferruccio fugue germany hindemith historyandcriticism influencebach johannsebastian karl max milne motivation motivation(psychology) music paul philosophy physics pianomusic reger schwarzschild science