This website has some really neat PDF documents that were probaby training manuals for the Apollo program. My guess is these manuals were originally proprietary to the North American Aviation Corp. and used for training aeronautical engineers and astronauts. There are details shown that I've never seen before.

One thing that really made me smile was pg. 97 of "ApolloFAM67.pdf". On this page is a Command Module Reaction Control System Engine (CM RCS Engine). I actually own one of these engines that I bought almost 30 years ago from a junk store in North Hollywood (I think the store was Nortons but I'm not certain). I always suspected it was an Apollo RCS engine but didn't know for sure until I saw it in this publication. It'd probably fetch a pretty penny on eBay, not that I'd ever part with it.

Gary