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http://science.howstuffworks.com/douglas-a-4-skyhawk.htm

http://www.globalsecurity.org/military/systems/aircraft/a-4-var.htm

http://www.aerospaceweb.org/aircraft/attack/a4/

http://www.warbirdsite.com/museumskyhawk.html

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http://commons.wikimedia.org/wiki/Douglas_A-4_Skyhawk

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http://erjets.com/photo_19.html

http://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=165

http://heroeswiki.com/A-4_Skyhawk

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http://modelingmadness.com/decals/decals%20A/a4.htm

http://www.hobby-lobby.com/a4.htm