@article{oai:nifs-repository.repo.nii.ac.jp:00002767, author = {"Okai, T. and Momoshima, N. and Kakiuchi, H. and Sakuma, Y."}, journal = {Annual Report of National Institute for Fusion Science}, month = {2016-03-14}, title = {Study on Environmental Tritium: Development of Monitoring Method and Analysis of Factors Controlling the Variation}, volume = {Annual Report Apr.1999 - Mar.2000}, year = {} }