found: Duo sur Acteon, op. 24, [1830?]:title page (J. Klemczynski)
found: Encyklopedia muzyczna PWM, 1997(Klemczyński, Julian; born 1807 in the old section [Stare Miasto] of Kalisz; died approximately 1851 in Paris; Polish composer)
found: NUKAT Center (Poland) in VIAF, accessed October 9, 2013(Klemczyński, Julian, 1807-ca. 1851)
found: Oxford Music Online, accessed October 9, 2013(Klemczyński, Julian, born 1810 in Stare Miasto near Kalisz; died 1851? in Paris; Polish pianist and composer)
found: OCLC, October 9, 2013(access points: Klemczyński, Julian, 1810-1851? [predominant]; Klemczynski, Julien; Klemczynski, J., Klemczyński, Julian, 1807-1851)