How to Cite "Years ago I learned that our national highway system has built-in runways for emergency landing strips. Is this still true?" from CliffsNotes.com:

CliffsNotes.com. Years ago I learned that our national highway system has built-in runways for emergency landing strips. Is this still true?. 02 Oct 2014
<http://www.cliffsnotes.com/cliffsnotes/history/years-ago-i-learned-that-our-national-highway-system-has-built-in-runways>.



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