00278nam a2200109Ia 4500008004100000040001100041100001500052245003700067260004300104300001200147300000900159251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aH. R. Lang 0aJournal Of Scientific Instrument  c1958bThe Institute Of PhysicsaLondon  aP.1-491  bV.35