@Barzon Kerman most of those documents are for POST Apollo.  That is to say one of the myriad of proposals for the Space Shuttle.  Back in the negative Nixion years (he hated the idea of 'wasting money in space') a LOT of programs were restructured and had similar sounding names to disguise the extra funding being used on things the administration didn't really want.   Others, like the McDonald Douglas Big Gemini are talked about as if they are derivative from an earlier program.  The Big-G caps