John Wright's very kindly allowed us to put copies of his 1980s "5-String Stanley Style" booklet on-line.
http://www.clinchmountainecho.co.uk/articles/stanleystyle.php
There were two editions of the booklet published in 1984 and 1988, each with a (mostly) different selection of tabs, but it was the introductory pages where John goes into the 'nuts & bolts' of Ralph Stanley's picking that really did it for me...
You can also still get copies of the 2nd editon from Jack Hatfield too.