Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Robert H. Tyler and Thomas B. Sanford and Josef M. Oberhuber,Geophysical Challenges in Using Large-Scale Ocean-Generated EM Fields to Determine the Ocean Flow,Journal of Geomagnetism and Geoelectricity,00221392,Tokyo : Terra Scientific Pub. Co,1997,49,11・12,1351-1372,https://cir.nii.ac.jp/crid/1521980704811790464,