Aeospace Industries Association.
http://www.aia-aerospace.org/

Aerospace Industries of Canada.
http://www.aiac.ca/

AeroSpaceNews.
http://www.aerospacenews.com/

Air Force Association.
http://www.afa.org/

American Helicopter Society.
http://www.vtol.org/

American Institute of Aeronautics and Astronautics.
http://www.aiaa.org/

Aviation Week and Space Technology.
www.aviationnow.com/awst

Defence Systems Daily.
http://defence-data.com/

Defense, Aerospace, and Transportation Information.
http://www.jasnes.com

Defense News.
http://www.defensenews.com/

Helicopter Association International.
http://www.rotor.com/

Marketplace for industry professionals.
http://www.aerospaceonline.com/content/homepage/default.asp

National Aeronautics and Space Administration (NASA)
http://nasa.gov/

Space News.
http://www.spacenews.com/