1995GOST 2408.1-1995 Solid fuel. Methods for determination of carbon and hydrogen
1986GOST 27044-1986 Coal coke. Methods for the determination of cardon and hydrogen content
GOST 27044-1986 Coal coke. Methods for the determination of cardon and hydrogen content was changed to GOST 2408.1-1995 Solid fuel. Methods for determination of carbon and hydrogen.