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BS 1000[3/30]:1980

Universal Decimal Classification. Second English full edition-Social sciences in general. Sociology. Sociography
standard by BSI Group, 04/30/1980

BS 2794-4:1979

Specification for textile machinery and accessories. Drafting equipment for preparation and spinning machinery-Bottom fluted rollers for drafting systems
standard by BSI Group, 08/31/1979