1978GOST 13938.4-1978 Copper. Methods for determination of iron / Note: To be replaced by GOST 31382 (2009).
0000 GOST 13938.4-1968
GOST 13938.4-1978 Copper. Methods for determination of iron / Note: To be replaced by GOST 31382 (2009). was changed to GOST 31382-2009 Copper. Methods of analysis.