TY - JOUR T1 - Note on the Association of Helium and Thorium in Minerals JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 80 IS - 535 SP - 56 EP - 57 PY - 1907/12/09/ UR - http://dx.doi.org/10.1098/rspa.1907.0074 M3 - doi:10.1098/rspa.1907.0074 AU - Strutt, R. ER -