(1967). Specification for steel tubes and tubulars suitable for screwing to bs 21 pipe threads. London: British Standards Institution.
Chicago Style CitationSpecification for Steel Tubes and Tubulars Suitable for Screwing to Bs 21 Pipe Threads. London: British Standards Institution, 1967.
MLA CitationSpecification for Steel Tubes and Tubulars Suitable for Screwing to Bs 21 Pipe Threads. London: British Standards Institution, 1967.
Warning: These citations may not always be 100% accurate.