WINTERKORN, H. (1975). Foundation Engineering Handbook. Van Nostrand Reinhold Company.
Lua i Stíl Chicago (17ú heag.)WINTERKORN, Hans. Foundation Engineering Handbook. Van Nostrand Reinhold Company, 1975.
Lua MLA (8ú heag.)WINTERKORN, Hans. Foundation Engineering Handbook. Van Nostrand Reinhold Company, 1975.
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