@misc{Peckham_John_(1220?-1292)._Ioannis,
 author={Peckham, John (1220?-1292).},
 howpublished={online},
 publisher={Coloniae Agrippinae : Apud Haeredes Arnoldi Birckmanni.},
 language={lat},
 type={stary druk},
 title={Ioannis Archiepiscopi Cantvariensis, Perspectivae Commvnis Libri Tres. [...].},
 keywords={Optyka},
}