COWAN, H. J. (1982). Design Of Reinforced Concrete Structure Henry J. Cowan. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)COWAN, Henry J. Design Of Reinforced Concrete Structure Henry J. Cowan. Prentice-Hall, 1982.
Lua MLA (8ú heag.)COWAN, Henry J. Design Of Reinforced Concrete Structure Henry J. Cowan. Prentice-Hall, 1982.
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