1. Su la influenzia di alcunl elementi meteorologici de la dlffusione del radon nell, aria tellurica;Aliverti;An. Geofis.,1949
2. Results of atmospheric measurements made aboard tie Galilee, 1907–1908, and the Carnegie, 1909–1916;Bauer;Res. Dept. Ter. Mag. Carnegie Inst. Wash.,1917
3. On the natural radioactivity in the air;Blifford,1952
4. Atmospheric radioactivity;Bumstead;Amer. J. Sci.,1904
5. Synthetic observations on the activity of rainwater;Castillo;An. Fis. Quim.,1913