TY - JOUR T1 - A Study of the Radio-Activity of Certain Minerals and Mineral Waters JF - Proceedings of the Royal Society of London (1854-1905) VL - 73 SP - 191 EP - 197 PY - 1904/01/01/ UR - http://dx.doi.org/10.1098/rspl.1904.0029 M3 - doi:10.1098/rspl.1904.0029 AU - Strutt, R. ER -