The APOLLO LUNAR LANDING MISSION SYMPOSIUM
NASA
<a rel="nofollow" class="external free" href="https://www.hq.nasa.gov/alsj/LunarLandingMIssionSymposium1966_1978075303.pdf">https://www.hq.nasa.gov/alsj/LunarLandingMIssionSymposium1966_1978075303.pdf</a>