00553cam a22001217a 4500008004000000082001500040245014400055260005000199300000700249700006900256999001900325952008700344180718b1952   xxu||||| |||| 00| 0 eng d  aT82 In2n/2  aUnits & standards of measurements employed at the national physical laboratorycby Department of Scientific and Industrial Research, United  aLondonbHer Majesty's Stationery Officec1952  a8p  aUnited Kingdom. Department of Scientific and Industrial Research  c498259d498259  00104070aIIPAbIIPAd2018-08-04oT82 In2n/2pGR2549r2018-08-04w2018-08-04yGR