Gipe, Paul B., 1995. Design as if People Matter: Aesthetic guidelines for the Wind
Industry. Retrieved on September 22, 2001 from
Tietenberg, Tom, 2001. Environmental Economics and Policy. Addison Wesley,
U.S. Agency for International Development (AID), 1986. Decentrailized Hydropower in AID’s Developmental Assistance Program. AID, Washington, D.C., p. 152.
U.S. Department of Energy, 2001. Quick Facts About Wind Energy. Retrieved on