@article{NSR1961RO14, author="H. {Rodenbusch} and G. {Herrmann}", title="Ein Verfahren zur Bestimmung von Halbwertszeiten kurzlebiger gasformiger Radioisotope. Die Halbwertszeiten des Thorons ($^{220}$Rn) und Actinons ($^{219}$Rn)", journal="Z.Naturforsch", year=1961, volume="16a", pages="577" }
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