@misc{Iwanowska_Wilhelmina_(1905-1999)_Subsystems,,
 author={Iwanowska, Wilhelmina (1905-1999)},
 copyright={Pruska, Kamila},
 address={Warszawa},
 howpublished={online},
 publisher={PWN},
 language={eng},
 title={Subsystems, Populations and masses of Stars},
 type={nadbitka},
 keywords={systemy gwiazdowe},
}