ISO 80000-9: Quantities and units—Part 9: Physical chemistry and molecular physics
['ISO 80000-8: Quantities and units—Part 8: Acoustics', 'ISO 80000-9: Quantities and units—Part 9: Physical chemistry and molecular physics', 'International Organization for Standardization', 'ISO 80000-8:2007: Quantities and units—Part 8: Acoustics', 'ISO standard']