000 002950000a22001450004500
003 BGCL
040 _aBGCL
082 _a530
_bphy 133
245 _aLight
_cby R.W.Ditchburn
260 _aOxford
_bE.L.B.S.
_c1963
650 _aPHY.
041 _aeng
700 _aDitchburn, R.W.
942 _cBOOK
999 _c11146
_d11146