LMI has some information, other places to look is Pantheon guitars website, read the articles by Dana Bourgeois under the tonewoods and voicing section, There is some articles on voicing a top there, I found it useful. http://www.pantheonguitars.com/ Otherwise I liked the book by Cumpiano http://www.amazon.com/Guitarmaking-Tradition-Technology-Construction-Steel-String/dp/0811806405
You can look throught my Padauk Dreadnought build thread as well, I put up the whole build and tried to explain everything as it was done.