| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.0556 | XRF |
1986.1 | Personal communication, Sheffield Univ., England | | | | R.Kanaris-Sotiriou |
| 0.0574 | AA |
1987.04 | Personal communication, University of Lund, Sweden | | | | Z.Solyom |
| 0.063 | INAA |
1987.09 | Personal communication, National Sci. Museum, Tokyo, Japan | | | | F.Wakabayashi and M.Shima |
| 0.0525 | AA |
1989.1 | Analysis of geochemical reference materials using simultaneous multi-element atomic absorption spectrometry | Geost. Newsletter | 13 | 205-215 | J.S.Kane |
| 0.0510 | INAA |
1989.12 | Personal communication, Kanazawa University | | | | A.Ishiwatari |