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PAC, 1979, 51, 2451. 'Quantities and Units in Clinical Chemistry' on page 2472 (https://doi.org/10.1351/pac197951122451)
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2215 (https://doi.org/10.1351/pac199062112167)