@misc{Betgen_Johann_Friedrich_Potentissimo,
 author={Betgen, Johann Friedrich},
 address={Norimbergæ},
 howpublished={online},
 publisher={Homannowie, Dziedzice},
 language={ger},
 language={lat},
 title={Potentissimo Borussorum Regi Friderico Wilhelmo Majestate, Fortitudine Clementia Augustissimo Hancce Lithuaniam Borussicam in qva loca colonijs Salisburg. ad incolendum Regio nutu concessa chorographice exhibentur DDD Regiae Suae Maiestatis},
 keywords={mapy, 18 w., Gusiew (Rosja), kartografia, plany miast, Prusy Wschodnie, Litwa},
}