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Lua i Stíl Chicago (17ú heag.)Environmentally Sound Water And Soil Management Editor E. Gordon Kruise; Chuck R. Burdick And Yousef A. Yousef. ASCE, 1982.
Lua MLA (8ú heag.)Environmentally Sound Water And Soil Management Editor E. Gordon Kruise; Chuck R. Burdick And Yousef A. Yousef. ASCE, 1982.
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