[S10nova]

Move if not in the correct forum but I just received a 1970 Nova Assembly Manual off of eBay from a seller of..assembly manuals
..it's not in book form but has 3 holes punched to insert into a binder.
Are most/all like this?
Any insight or history on the assembly manuals overall would be great.
It looks like they are copied pages from original GM literature and then just repeatedly copied and passed around.
Thanks