@misc{_Summarius,
 rights={Domena publiczna (Public domain)},
 language={lat},
 type={stary druk},
 title={Summarius Computus Ex Variis Computualibus libris breviter recollectus, cu[m] additione declarationum capituli uniuscuiusq[ue] denuo castigatus et revisus},
 keywords={matematyka - 16 w., kalendarze - 16 w.},
}