Methods for the analysis of iron and steel. Silicon in acid resisting high silicon iron: Gravimetric
standard by BSI Group, 02/21/1966
Methods for the analysis of steel . Sulpher in steel
standard by BSI Group, 01/23/1957
Standard form of time and wages sheet and pay packet for the building and civil engineering contracting industries
standard by BSI Group, 02/27/1961
Specification for medical gas cylinders, valves and yoke connections
standard by BSI Group, 10/29/1976