TY - JOUR T1 - Erratum: Note on the Production of Secondary Rays by a-Rays from Polonium JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 78 IS - 521 SP - vi EP - vi PY - 1906/07/21/ UR - http://dx.doi.org/10.1098/rspa.1906.0052 M3 - doi:10.1098/rspa.1906.0052 ER -