2014GOST 13047.7-2014 Nickel. Cobalt. Methods for determination of sulphur
2002GOST 13047.7-2002 Nickel. Cobalt. Methods for determination of sulphur
1981GOST 13047.3-1981 Nickel. Methods for the determination of sulphur
0000 GOST 13047.3-1967
GOST 13047.3-1981 Nickel. Methods for the determination of sulphur was changed to GOST 13047.7-2002 Nickel. Cobalt. Methods for determination of sulphur.