@misc{, copyright={Public Domain}, address={S.P.B.}, journal={Specìal'naâ Karta Evropejskoj Rossìi 1:420 000}, howpublished={online}, type={Image}, URL={http://www.rcin.org.pl/igipz/Content/91506/PDF/WA51_97343_PANC747-1-r1914_1.pdf}, keywords={chorographic maps, central Poland, Poznań region, Płock region, Kalisz region}, }