Chabot Space & Science Center - www.chabotspace.org or www.soyuzsecret.com

USS Hornet Museum - www.uss-hornet.org

Astronaut Scholarship Foundation - www.astronautscholarship.org

Astronaut Dick Gordon - www.dickgordon.com

Rocketman Productions - http://www.rocketmanproductions.com

Out of This World Appraisals - www.astrospace.net

Presidents Commission on Moon, Mars & Beyond - www.moontomars.org

NASA Human Space Flight - www.spaceflight.nasa.gov

Collectspace - www.collectspace.com