@misc{Caselius_Johannes_(1533-1613)_Ad,
 author={Caselius, Johannes (1533-1613)},
 howpublished={online},
 publisher={Möllemann, Stephan (15..-1610). Druk.},
 language={lat},
 type={stary druk},
 title={Ad Ill[ustrissi]mvm Principem Albertvm Fridericvm, Dvcem Borvssorvm, Marchionem Brandenbvrgensivm, Ioannis Caselii Epistola. Adiecimvs Eivsdem Alias, quas neq[ue] ipsas instructuose lectum iri arbitraremur},
}