00330nam a2200133Ia 4500008004100000020000700041040003000048082001400078100001900092245003800111260002400149300001100173650001200184190302s9999||||xx |||||||||||||| ||und||  c95  aKharagpur College Library  a535bAC44  aD. P. Acharyya  aGcometri optical Advanced Studant  bOxfordaDehlic1970  a402 p.  aPhysics