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Karlheinz Stockhausen — (22 August 1928 ndash; 5 December 2007) was a German composer, widely acknowledged by critics as one of the most important (Barrett 1988, 45; Harvey 1975b, 705; Hopkins 1972, 33; Klein 1968, 117) but also controversial (Power 1990, 30) composers… … Wikipedia
Pietro Biginelli — (July 25th 1860 –January 15th 1937) was an Italian chemist, who have discovered a three component reaction between urea, acetoacetic ester and aldehydes (Biginelli reaction). He also was studying various aspects of sanitation chemistry and… … Wikipedia

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