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San San Francisco Sankt-Peterburg San Marino San hô đen San Siro San hô Santi Cazorla Sanyo Santiago de ChileTài liệu tham khảo
WikiPedia: San đất http://projects.geosyntec.com/NPSManual/Fact%20She... http://link.springer.com/article/10.1007%2FBF02465... http://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nr... http://kashanu.ac.ir/Files/Content/ldt_gsg0.pdf http://ascelibrary.org/doi/abs/10.1061/(ASCE)0733-... https://web.archive.org/web/20141025154919/http://...