000 00374nam a2200169Ia 4500
008 180424s9999 xx 000 0 und d
020 _a335043844
084 _a535 O1:7
245 0 _aWaves and Rays
250 _a\\197800ENGGPSX
260 _aO U P
260 _b1978
260 _cLondon
300 _a54p
500 _aincludes index and biblioraphy
942 _cBK
999 _c39208
_d39208