00310nam a2200133Ia 45000030006000000080041000060400015000471000033000622450033000952500010001282600009001385460012001470050017001590STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aAjoy Ghatak; Thyagarajan, K.  aIntroduction to fiber optics  aFirst  c1999  aEnglish20220125170149.0