Books on Tube Rolling


I would like to know if some one could recommend a book on tube rolling. What is using a 12au7 vs.a 12at7? A book that would tell you options for a given tube etc. etc. etc.
qdrone
Post removed 
This is not quite what you asked for, but it's been pretty much the de facto source for tube rollers:

Joe's Tube Lore
http://www.tubebooks.org/Books/crowhurst_basic_3.pdf
Crowhurst is legendary with amp builders. I've read this several times.