00370nam a2200121 a 4500008004100000020001500041050001400056245004100070246004700111260005400158300002700212350000900239120416s0000    ||||||||||||||||| ||    u  a0626012163  aQC 91 Int14aThe International metric system (SI)  aguide to the use of the SI in South Africa  aPretoriabBureau of South African Standardsc1973  avariant pagings : ill.  a0.00