@misc{Metallmann_Joachim_(1889–1942)_Von_1928],
 author={Metallmann, Joachim (1889–1942)},
 copyright={Public Domain},
 address={[Berlin},
 howpublished={online},
 year={1928]},
 publisher={Simion},
 publisher={(s. n.)},
 language={ger},
 title={Von den Prinzipien der Naturgesetzlichkeit},
 type={Text},
 URL={http://www.rcin.org.pl/Content/27370/PDF/WA004_20818_P10864_Metallmann-Von-den-p_o.pdf},
 keywords={philosophy of natural sciences},
}