Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHIROMA Yoshitaka and SHIROMA Masato and KINA Seigou and HOSODA Masahiro and YASUOKA Yumi and AKATA Naofumi and FURUKAWA Masahide,"Source of Atmospheric Radon in the Gyokusendo, a Limestone Cave in Okinawa, Japan",Japanese Journal of Health Physics,1884-7560,Japan Health Physics Society,2016,51,4,218-226,https://cir.nii.ac.jp/crid/1390001204290262400,https://doi.org/10.5453/jhps.51.218