@misc{Wielka_Brytania._War_Office._Instytucja_sprawcza._Wydawca_Helsinki_1948,
 author={Wielka Brytania. War Office. Instytucja sprawcza. Wydawca and Wielka Brytania. Ordnance Survey. Redaktor},
 copyright={Public Domain},
 address={[Londyn]},
 journal={Europe Scale 1:1,000,000},
 journal={GSGS Misc},
 howpublished={online},
 year={1948},
 publisher={War Office},
 language={eng},
 type={Image},
 title={Helsinki : North P-34, 35 & 36},
 URL={http://rcin.org.pl/igipz/Content/183485/PDF/WA51_184042_PTGC12-8-r1948_Helsinki-North-P-3_0001_0001.pdf},
 keywords={topographic maps, aerial maps, Petrozavodsk (Russia; region), Vyborg (Russia; region)},
}