2014GOST 13047.19-2014 Nickel. Cobalt. Method for determination of aluminium
2002GOST 13047.19-2002 Nickel. Cobalt. Method for determination of aluminium
1980GOST 741.11-1980 Cobalt. Method for the determination of aluminium
0000 GOST 741.11-1969
GOST 741.11-1980 Cobalt. Method for the determination of aluminium was changed to GOST 13047.19-2002 Nickel. Cobalt. Method for determination of aluminium.