@misc{_Antarctica_1947,
 copyright={Public Domain},
 address={Washington, D. C.},
 howpublished={online},
 year={1947},
 publisher={published at the Hydrographic Office},
 language={eng},
 title={Antarctica : latitudal scale 1:11,250,000},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/215623/PDF/WA51_224189_PTGD1132-r1947_Antarctica_0001.pdf},
 keywords={hydrographic maps, Antarctic},
}