BOELES, J. E., & Bowles , J. E. (1980). Structural Steel Design Joseph E. Bowles. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BOELES, Joseph E., agus Joseph E. Bowles. Structural Steel Design Joseph E. Bowles. McGraw-Hill, 1980.
Lua MLA (8ú heag.)BOELES, Joseph E., agus Joseph E. Bowles. Structural Steel Design Joseph E. Bowles. McGraw-Hill, 1980.
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