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BS 1747-8:1986

Methods for measurement of air pollution-Determination of the mass concentration of nitrogen dioxide in ambient air: modified Griess-Saltzman method
standard by BSI Group, 07/31/1986

BS 1016-4:1973

Methods for analysis and testing of coal and coke-Moisture, volatile matter and ash in the analysis sample of coke
standard by BSI Group, 12/31/1980

BS 2000-13:1983

Methods of test for petroleum and its products-Conradson carbon residue of petroleum products
standard by BSI Group, 02/28/1983