@misc{Valk_Gerard_(1652-1726)_Bulgaria,
 author={Valk, Gerard (1652-1726) and Valk, Leonard (1675-1746)},
 address={Amstelodami},
 howpublished={online},
 publisher={Valk, Gerard (1652-1726)},
 language={lat},
 title={Bulgaria et Romania, divisa in singulares Sangiacatus Silistriam, Nicopolin, Bodinum, Sardiam, Bysantium, Kirkeliam et Gallipolin, una cum finitimis Regionibus Valachia, Servia etc. per Ger. et Leon. Valk.},
 keywords={mapy, 17 w., Bułgaria, kartografia, Rumunia},
}