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041 _aeng
082 _aC6:45-11:9, G8
100 _aWalker R C
245 0 _cWalker R C; Lane T M C
_aPhotoelectric cell applications
250 _a3rd
260 _c1938
300 _ap.
_ccm.
650 _aPhysics
700 _a Lane T M C
942 _hC6:45-11:9, G8
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999 _c95054
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