@misc{_Gambia_1931,
 copyright={Public Domain},
 address={[Londyn]},
 howpublished={online},
 year={1931},
 publisher={War Office},
 language={eng},
 title={Gambia},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/210656/PDF/WA51_202376_PTGD1109-r1931_Gambia_0001.pdf},
 keywords={political-administrative maps, chorographic maps, Gambia},
}