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Beckwith 2012
Quartet score IMI 115
Quartet No. 15 may be the Pollicino Quartet, Op. 550, of 1990, for violin, viola, cello, and string bass, or the Jacques Chirac piece listed here.
Sekretariat for Ny Kompositionsmusik [2011-12-25] Møllerhøj 1980
Nicolai Berezowsky scores, Music Division, New York Public Library [2014-05-17]
Stephan 1998, 2007
Popescu 1987
Born in the Grand Duchy of Finland
Information is needed on the length of his stay in Switzerland in the mid-1950s.
All dates to be verified. The website about the composer has no dates and little useful information.