@misc{Condrau_Jakub_(1779–1836)_Trigonometria,
 author={Condrau, Jakub (1779–1836)},
 howpublished={online},
 publisher={Typis Akademicis Soc. Jesu},
 language={lat},
 type={podręczniki},
 title={Trigonometria plana et sphaerica},
 keywords={trygonometria płaska, trygonometria sferyczna},
}