The Provisional Revised Nemeth Course Manual is currently hosted on NFB’s website. The following link should take you to a page from which revision logs, front matter, table of contents, Lessons 1-8, and an appendix – in both PDF and BRF files – are available.
https://nfb.org/math-transcribing#9
[It is possible that clearing your browser history will allow you to see the most updated version of the NFB webpage.]
Thank you for the question!
–Kyle