@misc{_Zanzibar_[1951],
 copyright={Public Domain},
 address={[Miejsce nieznane]},
 address={(Miejsce nieznane)},
 howpublished={online},
 year={[1951]},
 year={1951)},
 publisher={Published by Directorate of Colonial Surveys D.C.S.992},
 publisher={(G.S.G.S.)},
 language={eng},
 title={Zanzibar},
 type={Image},
 URL={http://www.rcin.org.pl/Content/210655/PDF/WA51_199246_PTGD1111-r1951_Zanzibar_0001.pdf},
 keywords={chorographic maps, Zanzibar},
}