Comment on Moon Landing Hoax Proof by jfb.
Paper copies were destroyed because storage costs money; many (not all) documents were saved to microfilm for long-term storage. Some of these documents are available online, such as:
That’s far from a complete list; I’m sure there are more. A random Google search of “apollo spacecraft technical drawings” will show dozens of diagrams, schematics, and other images.
It’s also worth remembering that the whole Apollo project was distributed among multiple contractors – North American Aviation built the Command Module, Grumman built the Lunar Module, Rocketdyne built the F1 and J2 engines, etc. Each owned their own set of construction blueprints, and each had their own long-term storage policies.
We also have hardware that was built but never flown that can serve as reference articles.