1. American Association of Airport Executives (AAAE) . 2003 . CY2001 FAA Passenger Enplanement Activity Summary by Primary Airports, Rank Order . www.aaae.org/members/240_Information_Library/2001enplanementinfo.pdf[accessed November 29, 2005].
2. Is public expenditure productive?
3. Airport Finance
4. Donald Axelrod . 1992 . Shadow Government: The Hidden World of Public Authorities-and How They Control over $1 Trillion of Your Money . New York: Wiley.