@misc{_M_[1944],
 copyright={Public Domain},
 address={Gotha},
 journal={Vogels Karte von Mitteleuropa. Fliegerkarte},
 howpublished={online},
 year={[1944]},
 publisher={Justus Perthes},
 language={ger},
 title={M 33-NO Breslau},
 type={Image},
 URL={http://rcin.org.pl/Content/210095/PDF/WA51_188442_PTGC61-15-r1944_M-33-NO-Breslau_0001.pdf},
 keywords={topographic maps, aerial maps, Wrocław region},
}