@misc{_Sonnenscheindauer._1941,
 copyright={Public Domain},
 howpublished={online},
 year={1941},
 language={ger},
 title={Sonnenscheindauer. Kurnik 1941},
 URL={http://www.rcin.org.pl/Content/130902/PDF/KOR001_163501_1941_Sonnenscheindauer-K.pdf},
 keywords={climatology, meteorology, meteorological data, weather station},
}