GOST 10742-1971 Brown coals, hard coals, anthracite, combustible shales and coal briquettes. Methods of sampling and preparation of samples for laboratory tests
ISO 13909-1:2001 Hard coal and coke - Mechanical sampling - Part 1: General introduction
ISO 13909-2:2001 Hard coal and coke - Mechanical sampling - Part 2: Coal; Sampling from moving streams
ISO 13909-3:2001 Hard coal and coke - Mechanical sampling - Part 3: Coal; Sampling from stationary lots