000			00322nam a2200133Ia 4500
008			180612s9999||||xx |||||||||||||| ||und||
041			_aen
082			_a398.6
100			_aCHESTNOV,F.I
245		4	_aThe ionosphere and its riddles
260			_aMoscow. _bForiegn language pub house _c1956
300			_a64p
942			_cPR
999			_c67638 _d67638