| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
|---|---|---|---|---|---|---|---|
| 0.12 | ICPES | 1990.04 | Personal communication, Geological Survey of India | B.G.Rao | |||
| 0.19 | ICPMS | 1993.04 | Simultaneous determination of thirty-seven trace elements in twenty-eight international rock standards by ICP-MS | Geost. Newsletter | 17 | 81-97 | CD.Garbe-Schonberg |
| <0.30 | ICPES | 1993.09 | Personal Communication, Cesky Geologicky Ustav | I.Rubeska |