found: His Almanach polskich kompozytorów ... 1956.
found: His Oboe quartet, 1979:t.p. (Boguslaw Schaeffer)
found: His Dzieje muzyki, 1985:t.p. (Bogusław Schaeffer)
found: Grove music online WWW site, 03-25-04(Schaeffer (Schäffer), Bogusław; b. Lwów, 6 June 1929; Polish composer, theorist, and teacher)
found: Info. converted from 678, 2012-10-02(b. 1929)
found: Bogusław Schaeffer, an anthology, 2012:t.p. (Bogusław Schaeffer) p. 4 of cover (a Polish playwright, composer, musicologist and graphic designer)
found: MGG online, August 8, 2019(Bogusław Schaeffer; died July 1, 2019, Salzburg, at age 90)
