| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.066 | CHEM |
1985 | Determination uranium in GSJ, CRPG and CCRMP reference samples by delayed neutron assay | Geostandards Newsletter | | | E.S.Gladney |
| 0.12 | CHEM |
1985.08 | Personal communication, Govern. Chem. Lab., Brisbane, Australia | | | | H.A.Olszowy |
| 0.12 | CHEM |
1984.12 | Personal communication, Sheffield Univ., England | | | | R.Kanaris-Sotiriou |
| 0.06 | CHEM |
1984.1 | Personal communication, Geological Survey Prague, Czechoslovakia | | | | B.Moldan |
| 0.066 | UU |
1984.03 | Personal communication, DDR Zentrales Geologisches Institut, Berlin | | | | Gotte |
| 0.13 | UU |
1998 | Personal communication,GEOMAR,Germany | | | | K.Wolf |