@misc{Institute_of_Meteorology_and_Water_Management._National_Research_Institute_Wartości_1994,
 author={Institute of Meteorology and Water Management. National Research Institute},
 editor={Polish Academy od Sciences. Institute of Dendrology},
 editor={Przybył, Urszula. Data registering person},
 copyright={Creative Commons Attribution BY-SA 4.0 license},
 howpublished={online},
 year={1994},
 language={pol},
 title={Wartości usłonecznienia w godzinach. Maj 1994},
 type={Image},
 URL={http://rcin.org.pl/Content/152872/PDF/KOR001_183146.pdf},
 keywords={climatology, meteorology, weather station, insolation},
}