LEADER 01390aam 2200409I 450 001 9910711395703321 005 20160202091802.0 024 8 $aGOVPUB-C13-9c1f54a90ea46c877a5260aaa9be68aa 035 $a(CKB)5470000002482070 035 $a(OCoLC)936371320 035 $a(EXLCZ)995470000002482070 100 $a20160202d1961 ua 0 101 0 $aeng 181 $2rdacontent 182 $2rdamedia 183 $2rdacarrier 200 10$aMean electron density variations of the quiet ionosphere no. 4 /$fJ. W. Wright, L. A. Fine 210 1$aGaithersburg, MD :$cU.S. Dept. of Commerce, National Institute of Standards and Technology,$d1961. 215 $a1 online resource 225 1 $aNBS technical note ;$v40-4 300 $a1961. 300 $aContributed record: Metadata reviewed, not verified. Some fields updated by batch processes. 300 $aTitle from PDF title page. 320 $aIncludes bibliographical references. 606 $aIonosphere 615 0$aIonosphere. 700 $aWright$b J. W$01392660 701 $aFine$b L. A$01392661 701 $aWright$b J. W$01392660 712 02$aUnited States.$bNational Bureau of Standards. 801 0$bNBS 801 1$bNBS 801 2$bGPO 906 $aBOOK 912 $a9910711395703321 996 $aMean electron density variations of the quiet ionosphere no. 4$93505890 997 $aUNINA