@misc{Makowsky_C._Das_[ca,
 author={Makowsky, C.},
 title={Das Glück},
 title={Le bonheur},
 title={Happiness},
 address={[s.l.]},
 year={[ca 1920]},
 language={ger},
 language={fre},
 language={eng},
 type={pocztówka},
 publisher={T. S. N.},
 keywords={Karty pocztowe, Karty pocztowe -- 1900-1945},
}