DAY, K. W. (1995). Concrete Mix Design, Quality Control And Specification. E. & FN Spon.
Lua i Stíl Chicago (17ú heag.)DAY, Ken W. Concrete Mix Design, Quality Control And Specification. E. & FN Spon, 1995.
Lua MLA (8ú heag.)DAY, Ken W. Concrete Mix Design, Quality Control And Specification. E. & FN Spon, 1995.
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