@misc{_Liber,
 copyright={PAN Biblioteka Gdańska},
 howpublished={online},
 publisher={Noribergae :},
 publisher={Ex Typographia Mvsica Catharinae Gerlachiae,},
 language={łacina},
 type={druk muzyczny},
 title={Liber Secvndvs Gemmae Mvsicalis: Selectissimas Varii Stili Cantiones, Qvae Madrigali Et Napolitane Italis dicuntur, Quatuor, Quinque, Sex & plurium vocum, continens. :},
 title={Gemma Musicalis},
}