@misc{_Nature_1931,
 year={1931},
 rights={Domena publiczna (Public domain)},
 publisher={Macmillan and Co.},
 description={Zawiera: Supplement to Nature. 1931 December 5, No. 3240},
 language={eng},
 title={Nature : a Weekly Illustrated Journal of Science. Volume 128, 1931 December 5, [No. 3240]},
 type={czasopismo},
 keywords={nauki matematyczno-przyrodnicze, nauka},
}