www.abovetopsecret.com
ApolloHoax
www.apollohoax.net
Bad Astronomy
www.badastronomy.com/index.html
Clavius
www.clavius.org (also available in German at www.clavius.info)
Rocket and Space Technology
www.braeunig.us/space/
NEXT: Chapter 16. Apollo by the numbers