00346nam a2200133Ia 450000500170000000800410001702000090005804100120006708200140007910000200009324500520011326000350016565000120020020260917193304.0180829s9999||||ii |||||||||||||| ||eng||  a1765  aEnglish  a535.3 LRS  aLonghurst, R.S. 0aGeometrical and physical OpticscR.S. Longhurst  c1964bLongmans Green +ACY- co.  aPhysics