Das, B. M. (1999). Principles of foundation engineering (4th.ed.). PWS.
Chicago Stili AlıntıDas, Braja M. Principles of Foundation Engineering. 4th.ed. Pacific Grove: PWS, 1999.
MLA AlıntıDas, Braja M. Principles of Foundation Engineering. 4th.ed. PWS, 1999.
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