00301nam a2200097Ia 4500008004100000020001800041082002100059100003000080245005200110260004100162210430s9999    xx            000 0 und d  a0-521-31408-9  a621.380414 A312O  aGhatak A.K, Thyagarajan.K  aOptical Electronics /cGhatak A.K&Thyagarajan.K  aNew Yorkc1989bCambridge University