2013GOST 32221-2013 Copper concentrates. Methods of analysis
1980GOST 15934.6-1980 Copper concentrates. Metnods for determination of aluminium oxide
0000 GOST 15934.6-1970
GOST 15934.6-1980 Copper concentrates. Metnods for determination of aluminium oxide was changed to GOST 32221-2013 Copper concentrates. Methods of analysis.