@misc{Seckerwitz_Johann_(sen.)_Rechbuchleyn.,
 author={Seckerwitz, Johann (sen.)},
 address={[Wrocław]},
 howpublished={online},
 publisher={[Libisch, Kaspar]},
 language={ger},
 title={Rechbuchleyn.},
 keywords={16 w., podręczniki, rachunki},
}