RAJU, N. Beton Pratekan ( Prestressed Concrete). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)RAJU, N.krishna. Beton Pratekan ( Prestressed Concrete). McGraw-Hill.
Lua MLA (8ú heag.)RAJU, N.krishna. Beton Pratekan ( Prestressed Concrete). McGraw-Hill.
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