(1965). Specification for precision hexagon bolts, screws and nuts (B.S.W. & B.S.F. threads). London: British Standards Institution.
Παραπομπή Chicago StyleSpecification for Precision Hexagon Bolts, Screws and Nuts (B.S.W. & B.S.F. Threads). London: British Standards Institution, 1965.
Παραπομπή MLASpecification for Precision Hexagon Bolts, Screws and Nuts (B.S.W. & B.S.F. Threads). London: British Standards Institution, 1965.
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