00281nam a2200121Ia 45000030006000000080041000060400015000471000017000622450034000792600017001135460012001300050017001420STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aRamsey, A.S.  aElementary geometrical optics  bG.Bellc1914  aEnglish20220125170143.0