| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
|---|---|---|---|---|---|---|---|
| 0.19 | AA | 1988.01 | Personal communication, BMG, Philippines | E.M.Macalalad | |||
| 0.205 | AA | 1991.01 | Personal communication, Geological Survey of Japan | S.Terashima | |||
| <0.37 | INAA | 1989.03 | Personal communication, Musashi Institute of Technology, Japan | S.Hirai and S.Suzuki | |||
| 0.22 | AA | 1997 | Personal Communication,SKK,Japan | ||||
| 0.25 | OES | 1999 | Personarl Communication, Institute of Geology, Estonia | T. Kiipli |