01420nam 2200421Ia 450 991069710510332120230902162214.0(CKB)5470000002385866(OCoLC)748561163(EXLCZ)99547000000238586620110831d1975 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierRefractivity gradients in the Northern Hemisphere[electronic resource] /C.A. Samson[Washington, D.C.] :U.S. Dept. of Commerce, Office of Telecommunications,[1975]1 online resource (iii, 121 pages) illustrationsOT report ;75-59Title from title screen (viewed on Aug. 31, 2011)."April 1975."Includes bibliographical references (pages 15-16).OT report ;75-59.Atmospheric radio refractivityRawinsondesRefractionAtmospheric radio refractivity.Rawinsondes.Refraction.Samson C. A1408536United States.Department of Commerce.Office of Telecommunications.GPOGPOBOOK9910697105103321Refractivity gradients in the Northern Hemisphere3492695UNINA