00476nam a2200145Ia 4500003000900000008004100009040001600050080001900066100002100085245010300106260005000209300000900259650004100268700002100309IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a551.510.5bAPP  aAppleton, Edward 4aThe application of ionospheric data to radio communicationcSir Edward Appleton and W.J.G. Beynon.  aLondonbHer Majesty's Stationary Officec1948  a44p.  aAstronomy and Astrophysics Thesaurus  aBeynon, W. J. G.