@misc{_Prof._1921,
 address={Wien},
 howpublished={online},
 year={1921},
 publisher={Kartographische Anstalt G. Freytag & Berndt},
 language={ger},
 type={atlas},
 title={Prof. Hickmann's Geographisch-statistischer Universal-Atlas},
 keywords={Atlasy geograficzne, Geografia, Statystyka},
}