000			00373pam a2200133a 44500
082			_aNASA _bTT F-746
100			_aZevakina,R A
245	1		_aIONOSPHERE DISTURBANCES AND THEIR INFLUENCE ON RADIO COMMUNICATIONS.
260			_a _bNasa, Washington, D.C. _c1971
500			_aBound With Nasa Tt F-740-745.
700			_aLyakhova,L N
964			_gCIRC
997			_aTR15438 C
999			_c399672 _d399672