@misc{_Nature_1931,
 year={1931},
 rights={Domena publiczna (Public domain)},
 description={Zawiera: Supplement to Nature. 1931 June 20, No. 3216},
 publisher={Macmillan and Co.},
 language={eng},
 type={czasopismo},
 title={Nature : a Weekly Illustrated Journal of Science. Volume 127, 1931 June 20, [No. 3216]},
 keywords={nauki matematyczno-przyrodnicze, nauka},
}