000 00312nam a2200121Ia 4500
005 20251007104644.0
008 251006s9999 xx 000 0 und d
100 _achestnov,f.j
245 4 _athe ionosphere and its riddles. chestnov,f.j.
260 _a1st ed. | Moscow F.L.P.H.
260 _c1956
942 _cBOK
999 _c11823
_d11823