GORDON, J. (1979). Structures Why Things Don't Fall Down. Pitman.
Lua i Stíl Chicago (17ú heag.)GORDON, J.E. Structures Why Things Don't Fall Down. Pitman, 1979.
Lua MLA (8ú heag.)GORDON, J.E. Structures Why Things Don't Fall Down. Pitman, 1979.
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