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found: His IV symfonia, c1984: t.p. (Kazimierz Sikorski) Harrassowitz slip (b. 1895)
found: LC data base, 4-30-86 (hdg.: Sikorski, Kazimierz)
found: Grove music online, May 5, 2004 (Sikorski, Kazimierz; b. June 28, 1895, Zürich, d. July 23, 1986, Warsaw; Polish composer and teacher)