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020 _a0-19-442428-6
041 _aEnglish
082 _a535/WEL/OPT
100 _aW.T WELFORD
245 _aOPTICS
250 _a2ED
260 _bLOW PRICE PUBLICATION
_aLONDON
_c1981
300 _c150P
650 _aLIGHT & INFRARED & ULTRAVIOLET PHENOMENA
650 _aPHYSICS
942 _cBK
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