00309nam a2200133Ia 45000030006000000080041000060400015000471000016000622450032000782500010001102600026001205460012001460050017001580STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHeitler, W.  aQuantum theory of radiation  aThird  bClarendon pressc1957  aEnglish20220125170134.0