| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
|---|
| 5.91 | NAA |
1998 | Personal communication,Lucas Heights Science and Technology center ,Australia | | | | H.Waldron |
| 5.3 | XRF |
1998 | Personal Communication,New Mexico institute of Mining & Technology | | | | Chris McKee |
| 5.06 | ICPMS |
1994 | Personal Communication,WSU GeoAnalytical Laboratory, USA | | | | C. Knaack, S. Cornelius and P. Hooper |
| 5.06 | ICPMS |
2000 | Personarl Communication,Washington State University | | | | D. Johnson |
| 5.8 | EXRF |
2002 | Personal Communication, Southern Connecticut State Univ., USA | | | | T. Fleming |