000 00323nam a2200133Ia 4500
008 210901s1972 xx 000 0 eng d
082 _a530 BLA
245 0 _aElectromagnetic waves
260 _aEngland
_bPrnguin Books ltd
_c1971
300 _a119p.
650 _aPhysics
700 _aOgborn joan ed.
942 _2ddc
_cBK
999 _c11188
_d11188