00297nam a2200121 a 450000500170000002000150001708200190003210000200005124500160007126000350008730000190012249000340014120251203091514.0  a8122401562  a535.4,bD, tay  aTaylor, Charles  aDiffraction  aNew DelhibWiley easternc1987  aviii,55p, 24cm  aStudent monographs in physics