00487nam a2200157Ia 4500003000900000008004100009040001600050080001900066100001700085245009700102260004600199300001000245650004100255650001500296650001800311IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a551.510.5bMIT  aMitra, A. P. 0aIonosphere and space sciencecA. P. Mitra                                                     aDelhibNational Physical Laboratoryc1964  a196p.  aAstronomy and Astrophysics Thesaurus  aIonosphere  aSpace Science