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3. Redefining The Kilogram And Mole
4. Check Your IQ On The SI
5. Bureau International des Poids et Mesures and Organisation Intergouvernementale de la Convention du Mètre, The International System of Units (SI),8th ed., 2006. Available athttp://www.bipm.org/en/publications/si-brochure/(accessed Jul 2015) . This publication is commonly called the SI Brochure.