2.2.2 spase://SMWG/Person/Iliya.Cholakov 2012-04-20T12:34:56.789 Iliya Cholakov Geomagnetic Observatory Panagyurishte and Geophysical Institute of the Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria

Geomagnetic Observatory Panagyurishte, Panagyurishte 4500, Bulgaria

geomagpag@abv.bg +359 357 63231