2014GOST 13047.14-2014 Nickel. Cobalt. Methods for determination of bismuth
2002GOST 13047.14-2002 Nickel. Cobalt. Methods for determination of bismuth
1980GOST 741.17-1980 Cobalt. Method for the determination of bismuth
0000 GOST 741.17-1969
GOST 741.17-1980 Cobalt. Method for the determination of bismuth was changed to GOST 13047.14-2002 Nickel. Cobalt. Methods for determination of bismuth.