ASFORD, N. (1992). Airport Engineering Norman Ashford, Paul H. Wright. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)ASFORD, Norman. Airport Engineering Norman Ashford, Paul H. Wright. John Wiley & Sons, 1992.
Lua MLA (8ú heag.)ASFORD, Norman. Airport Engineering Norman Ashford, Paul H. Wright. John Wiley & Sons, 1992.
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