2013GOST 32221-2013 Copper concentrates. Methods of analysis
1982GOST 15934.10-1982 Copper concentrates. Methods for determination of gold and silver
0000 GOST 15934.10-1980
GOST 15934.10-1982 Copper concentrates. Methods for determination of gold and silver was changed to GOST 32221-2013 Copper concentrates. Methods of analysis.