000 00240 a2200073 4500
245 0 _aIonospheric Predictions /
_c.
_nVol. 1
710 2 _aDepartament of Commerce.
_eWydawca
_4pbl
260 _aBoulder, Colorado :
_bDepartament of Commerce,
_c1971.
300 _a18 s.;
_c35 cm.
999 _c6823
_d6823