Dunham, C. W. (1962). Foundations of structures (2.).
Lua i Stíl Chicago (17ú heag.)Dunham, Clarence W. Foundations of Structures. 2. New York, McGraw-Hill, 1962.
Lua MLA (9ú heag.)Dunham, Clarence W. Foundations of Structures. 2. 1962.
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