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- [6] The radio active substances in Dionats chemical and physical research SITZUNGSBERICHTE DER PREUSSICHEN AKADEMIE DER WISSENSCHAFTEN PHYSIKALISCH-MATHEMATISCHE KLASSE, 1929, : 535 - 542
- [7] A quantitative determination of the content of radio active substances in the atmosphere PHYSIKALISCHE ZEITSCHRIFT, 1908, 9 : 177 - 184
- [9] On the presence of radio-active matter in ordinary substances PROCEEDINGS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY, 1904, 12 : 391 - 397