00468pamaa2200157 4500 0000019255 20060621090000.0 0140136282 624.17 GOR 1978 TA645 GOR 1978 GORDON Structures : or why things don't fall down J.E. Gordon. London: Penguin Books, 1978. 395p.: [12] leaves of plates; 20cm. Structural analysis (Engineering) Structural engineering