Wikipedia:Articles for deletion/Space Launcher System
The creator of the article is too pissed with you all to come here himself, but https://en.wikipedia.org/w/index.php?title=User_talk:Maury_Markowitz&diff=861996875&oldid=861923890 tells me that the source was Heppenheimer.  He cannot remember the name of the book, but it may have been https://books.google.co.uk/books?id=p16jngEACAAJ ''The Space Shuttle Decision: Nasa's Search for a Reusable Space Vehicle''. On the basis of that, I think we should |AGF that this actually is reliably sourced, even if the source is currently uncertain.  I have put in a request for verification of this source at 
— User:Spinningspark, 13:37, 4 October 2018 (UTC)
Stance: keep
Cited policy: WP:AGF||WP:LIB (Wikipedia:Assume good faith)