Wells, Alexander T.; Seth B. Young (October 2003). "Airport and airport systems: A historical and legislative perspective". Airport Planning & Management (5th ed.). New York: McGraw Hill. pp. 68–70. ISBN0-07-141301-4. Archived from the original on 2007-09-28. Retrieved 2007-07-13.
Wells, Alexander T.; Seth B. Young (October 2003). "Airport and airport systems: A historical and legislative perspective". Airport Planning & Management (5th ed.). New York: McGraw Hill. pp. 68–70. ISBN0-07-141301-4. Archived from the original on 2007-09-28. Retrieved 2007-07-13.