@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://www.rcin.org.pl/igipz/Content/210095/PDF/WA51_188442_PTGC61-15-r1944_M-33-NO-Breslau_0001.pdf}, keywords={topographic maps, aerial maps, Wrocław region}, }