SI: the International System of Units ... /
International Bureau of Weights and Measures.
Page, Chester Hall.
Vigoureux, Paul.
National Physical Laboratory (Great Britain)
National Bureau of Standards.
London H.M.S.O.
1973
Translation of 'Le Système international d'unités'. Revised ed. Paris: International Bureau of Weights and Measures, 1973. - Previous ed. 1970
Metric system.