00270nam a2200097Ia 4500008004100000040001100041245004800052260004800100300001300148300001100161251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aJournal of Scientific & Industrial Research  cJuly-August, 1950bAcademic PressaNew York  aP. 1-810  bV. 143