2014GOST 13047.9-2014 Nickel. Cobalt. Method for determination of phosphorus
2002GOST 13047.9-2002 Nickel. Cobalt. Method for determination of phosphorus
1981GOST 13047.5-1981 Nickel. Method for the determination of phosphorus
0000 GOST 13047.5-1974
GOST 13047.5-1981 Nickel. Method for the determination of phosphorus was changed to GOST 13047.9-2002 Nickel. Cobalt. Method for determination of phosphorus.