00438nam a2200145Ia 4500003000900000008004100009040001600050080001700066100001800083245010900101260002600210300001000236650002400246650002200270IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.396bTHO  aThomson, John 0aRadio communication at ultra high frequencycJohn Thomson                                                 aLondonbMethuenc1950  a203p.  aNASA ThesaurusRadar  aRadio Engineering