I dug out a few books so you can visualise just a snippet of the amount of info out there others may want to add to the pictorial list as this gives us unheard of books per say to pursue ourselves.
There is so much out there you probably never get the whole lot but for collectors like myself I get what I can to try and learn more.
As always there are those that learned to work and repair them and they are a great font of knowledge for myself and others always appreciated advice & knowledge.
Cheers.