| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
|---|---|---|---|---|---|---|---|
| 2.7 | INAA | 1989.03 | Personal communication, Musashi Institute of Technology, Japan | S.Hirai and S.Suzuki | |||
| 4.28 | ICPMS | 1995 | Personal communication,Toho Univ.,Japan | N. Takamatsu | |||
| 5 | XRF | 1996 | Personal communication, Bremen Univ., Germany | M.Zuther | |||
| 3.3 | EXRF | 2002 | Personal Communication, Southern Connecticut State Univ., USA | T. Fleming |