| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 1.4 | OES |
1988.02 | Personal communication, USSR Academy of Sciences Siberian Branch | | | | V.P.Afonin |
| 1.40 | OES |
1989.1 | Determination of trace abundances of Ag, B, Ge, Mo, Sn, Tl and W in geochemical reference samples by atomic emission spectrography | Geost. Newsletter | 13 | 269-272 | A.I.Kuznetsova and N.L.Chumakova |
| 1.8 | ICPMS |
1994 | Personal Communication, Torei Research Center, Japan | | | | M.Tanaka |
| 6.80 | ICPMS |
1995 | Personal communication,Toho Univ.,Japan | | | | N. Takamatsu |