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![Cover image for A Discussion of the General Principles Involved in the Construction and Action of the Isometrical Truss Bridge [microform]](https://thumbs.readings.com.au/go9L79Np_WxLA-b5UXDJM4mwTVU=/0x500/https://readings-v4-production.s3.amazonaws.com/assets/9a4/f97/3e4/9a4f973e425f26c07ac8842f503dc56c2a4e316e/978101516947020211108-4-btzyvu.jpg)
