TY - JOUR T1 - The Mobilities of the Ions Produced by Rontgen Rays in Gases and Vapours JF - Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Math. or Phys. Character (1896-1934) VL - 209 SP - 249 EP - 279 PY - 1909/01/01/ UR - http://dx.doi.org/10.1098/rsta.1909.0011 M3 - doi:10.1098/rsta.1909.0011 AU - Wellisch, E. ER -