1. 1) Japan Coast Guard Annual Report 2016, Nikkei Printing Inc., Tokyo (2016), p.80.
2. 2) Yamasaki, Y, Sugiyama, M., Jpn. J. Forensic Sci. Tech., 11, (2), 139(2006).
3. 3) Miyabayashi, T., Torii, T., PETEROTECH, 25, 33 (2010).
4. 4) Furuta, A., PETEROTECH, 23, 360 (2000).
5. 5) Omori, T., PETEROTECH, 15, 125 (1992).