@misc{Koczalski_Raul_(1885-1948)_Frederic, author={Koczalski, Raul (1885-1948)}, address={Köln-Bayenthal}, howpublished={online}, publisher={Tischer & Jagenberg}, language={ger}, type={książka}, title={Frederic Chopin : Betrachtungen, Skizzen, Analysen}, keywords={Chopin, Fryderyk (1810-1849)}, }