Appliances, solid fuels and firelighters for barbecueing - Part 2: Barbecue charcoal and barbecue charcoal briquettes - Requirements and test methods; German version EN 1860-2:2005— 27 стр.
Investigations of raw material in hard-coal-mining - Microscopical examination of hard coal, coke and briquettes - Part 3: Maceral analysis on particulated blocks— 3 стр.