BILLINGTON, D. P. (1982). Thin shell concrete structures.-- Ed.2. McGraw-Hill Book.
Lua i Stíl Chicago (17ú heag.)BILLINGTON, David P. Thin Shell Concrete Structures.-- Ed.2. New York: McGraw-Hill Book, 1982.
Lua MLA (9ú heag.)BILLINGTON, David P. Thin Shell Concrete Structures.-- Ed.2. McGraw-Hill Book, 1982.
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