Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NISHIGAKI Makoto and KOMATSU Mitsuru and KIM Man-il,A basic study on monitoring method of contamination of soil and groundwater by using Frequency Domain Reflectometry method,Journal of Groundwater Hydrology,09134182,Japanese Association of Groundwater Hydrology,2004,46,2,145-157,https://cir.nii.ac.jp/crid/1390282680433871360,https://doi.org/10.5917/jagh1987.46.145