00453nam a2200145Ia 4500003000900000008004100009040001600050080001700066110003100083245011900114260003900233300001000272650001200282650001300294IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a53(047)bPHY  aPhysical Society of London 0aReports on progress in physicsbvol. XII, (91948-49)cThe Physical Society                                          aLondonbThe Physical Societyc1949  a382p.  aPhysics  aProgress