Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takahashi Yasuyuki and Igarashi Hiroshi and Hirano Kunihiro and Kawaharada Yasuhiro and Igarashi Hitoshi and Murase Ken-ya and Mochizuki Teruhito,Investigation of the Present Management Status of Calibration Source Based on the Law Concerning Prevention of Radiation Hazards Due to Radioisotopes,Japanese Journal of Radiological Technology,03694305,Japanese Society of Radiological Technology,2007,63,3,335-340,https://cir.nii.ac.jp/crid/1390282681339146112,https://doi.org/10.6009/jjrt.63.335