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2. New Flame;Barty-King,1984
3. Of bicycles, Bakelites, and Bulbs: Toward a Theory of Sociotechnical Change;Bijker,1997
4. Building Services Engineering;Billington,1982
5. Board of Trade, 1920. Return relating to all authorised Gas Undertakings in the United Kingdom, other than those of Local Authorities, for the year ended 31st December 1919. [Cmd. 1021], XLIX.113, p. 102–103. 〈http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:hcpp&rft_dat=xri:hcpp:rec:1921-024612〉