%0 Journal Article %T ELECTRICALINVESTIGATIONOFOILFIELDS. %A P. %A E. %A LAGERHJEIM %J µØÖÊѧ±¨ %D 1930 %X Theelectricalinvestigationoftheearth'scrustismadepossiblemainlybythedifferencesintheelectricalconductivitythatexistsbetweendifferentrocksandrockformations.Itisthereforeofgreatimportancetoknowthe %U http://www.geojournals.cn/dzxb/ch/reader/view_abstract.aspx?file_no=19300437&flag=1