00317nam a2200121Ia 45000030006000000080041000060400015000471000023000622450059000852600022001445460012001660050017001780STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHawkins Gerald, S.  aPhysics and astronomy of meteors comets and meteorites  bMcgraw hillc1964  aEnglish20220125170029.0