| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
|---|
| 2.1 | INAA |
1987.09 | Personal communication, Japan Chem. Anal. Center | | | | S.Suzuki and H.Fukushima |
| 2.1 | INAA |
1989.03 | Personal communication, Musashi Institute of Technology, Japan | | | | S.Hirai and S.Suzuki |
| 1.5 | AA |
1994 | Personal Communication, Czech Geol. surv, Czech Republic | | | | I.Rubeska |
| 1 | XRF |
1996 | Personal communication, Bremen Univ., Germany | | | | M.Zuther |
| 0.6 | AA |
1997 | Personal Communication,SKK,Japan | | | | |
| 1.93 | HAA |
1998 | Personal communication,GSJ,Japan | | | | S.Terashima |
| 2.0 | EXRF |
2002 | Personal Communication, Southern Connecticut State Univ., USA | | | | T. Fleming |