00270cam a22000977a 4500008004000000082002100040245004300061260002300104300001000127650003500137180718b1972   xxu||||| |||| 00| 0 eng d  aX203x42 Un3 / 72  aThe Building regulations 1972cBy HMSO  aLondonbHMSOc1972  a187p.  aBuilding laws -- Great Britain