00252nam a2200097Ia 4500008004100000100003100041245002400072250000800096260004200104300000800146191201s2012    xx            000 0 und d  aSUBRAHMANYAM, M and others 0aText book of optics  aRep  c2012bS Chand and Co. Ltd.aNEW DELHI  a729