@misc{Poniatowski_Stanisław_(1884-1945)_The,
 author={Poniatowski, Stanisław (1884-1945)},
 copyright={Copyright by Polskie Towarzystwo Ludoznawcze},
 howpublished={online},
 language={ger},
 language={pol},
 type={text},
 title={The social system - a course. State. Notes.},
 keywords={state, social groups, feudal state},
}