Universal Decimal Classification. English full edition-Economics
standard by BSI Group, 10/31/1985
Specification. Measurement of photographic transmission density
standard by BSI Group, 08/06/1947
Specification for hard-drawn copper solid and stranded circular conductors for overhead power transmission purposes
standard by BSI Group, 04/14/1930
Porcelain and toughened glass insulators for overhead power lines (3.3kV and upwards)
standard by BSI Group, 01/26/1955
Architects' engineers' and surveyors scales. Boxwood scales
standard by BSI Group, 04/02/1959
Overhead line-wire material (non ferrous) for telegraph and telephone purposes
standard by BSI Group, 03/03/1927