@misc{_Nature_1921,
 year={1921},
 rights={Domena publiczna (Public domain)},
 description={Brak numeru 2710},
 publisher={Macmillan and Co.},
 language={eng},
 type={czasopismo},
 title={Nature : a Weekly Illustrated Journal of Science. Volume 108, 1921 December 8, [No. 2719]},
 keywords={nauki matematyczno-przyrodnicze, nauka},
}