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Lua i Stíl Chicago (17ú heag.)Houlsby, G., C. Wroth, agus Z. Eisenstein. Direct Solution of Plasticity Problems in Soils by the Method of Characteristics. Balkema, 1983.
Lua MLA (9ú heag.)Houlsby, G., et al. Direct Solution of Plasticity Problems in Soils by the Method of Characteristics. Balkema, 1983.
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