| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.45 | GRAV |
1985.03 | Personal communication, University of Lund, Sweden | | | | Z.Solyom |
| 0.44 | XRF |
1985.06 | Personal communication, Earth Sciences Board, University of California | | | | J.Gill |
| 0.56 | GRAV |
1982.11 | Single pass major element X-ray fluorescence analysis of silicate rock samples using a Philips 1212 spectrometer | X-ray Spectrometry | 11 | 100-108 | R.J.Parker |
| 0.62 | ICPES |
1984.05 | Personal communication, Technical Service Laboratories, Canada | | | | A.H.Debnam |
| 0.41 | GRAV |
1987.07 | Personal communication, BMG, Philippines | | | | E.M.Macalalad |