jgg     2010 30 (Supp.1):  44-49    ISSN: 0412-1961  CN: 21-1139/TG DETERMINATION OF REFERENCE VALUE FOR ABNOMALINFORMATION EXTRACTION IN MOBILE GEOMAGNETIC SURVEY Su Shupeng Mobile Survey Team of Earthquake Administration of Hebei Province, Baoding 071000 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null