00476nam a2200145Ia 4500003000900000008004100009040001600050080001600066245012500082260004300207490002400250650001700274650001900291700002000310IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a550.38bLAV 0aTransactions of the Rome meeting september 14-25, 1954cedited by V. Lavrsen                                              aCopenhagenbHorsholm Bogtrykkeric1957  aIAGA Bulletin No.15  aGeomagnetism  aNASA Thesaurus  aLavrsen, V., ed