| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| <8000 | OES |
1990.05 | Personal Communication, U.S. Geological Survey, Lakewood | | | | J.S.Kane, J.G.Crock, P.H.Briggs and D.L.Fey |
| <0.2 | FAA |
1990.1 | Gold, palladium and tellurium in South African, Chinese and Japanese geological reference samples | Geost. Newsletter | 14 | 477-478 | E.Kontas, H.Niskavaara and J.Virtasalo |
| 0.13 | FAA |
1991.07 | Personal communication, Geological Survey of Japan | | | | S.Terashima |
| 0.2 | INAA |
1992.1 | Personal Commuication,Research Reactor Inst., Kyoto University, Japan | | | | T.Takeuchi |
| <4 | NAA |
1990 | Personal Communication, Los Aramos, USA | | | | E.S.Gladney |