@misc{Słupski_Zygmunt_(1851–1928)_W._[1910],
 author={Słupski, Zygmunt (1851–1928)},
 copyright={Public Domain},
 address={[Poznań]},
 howpublished={online},
 year={[1910]},
 publisher={[s.n.]},
 language={pol},
 title={W. Ks. Poznańskie},
 keywords={transport maps, Grand Duchy of Poznań, Wielkopolska Region, 20th century},
}