@misc{Sturm_L_Heimatskunde,
 author={Sturm, L.},
 howpublished={online},
 publisher={Ferdinand Hirt},
 language={niemiecki},
 title={Heimatskunde der Provinz Schlesien},
 type={book},
 keywords={1801-1900, Geografia i nauki o ziemi, Historia, Śląsk},
}