著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) HAKL J.,Radon transport phenomena studied in karst caves-international experiences on radon levels and exposures,Radiat. Meas.,,,1997,28,,675-684,https://cir.nii.ac.jp/crid/1574231876445249024,