@misc{Freytag_Adam_L'Architecture_1635,
 author={Freytag Adam},
 address={Leide},
 year={1635},
 publisher={chez les Elzeviers},
 language={fr},
 title={L'Architecture militaire ou la fortification nouvelle...},
 type={stary druk},
 keywords={architektura obronna 17 w.},
}