When I went through a 40s period in high school, I always frequented this site:

http://www.miss-vintage.com/

And here's some hair how-to's:

http://www.miss-vintage.com/features/hair.htm

And here's an old-school book on how to do the "latest styles" (from the 40s of course) called "How To Dress Your Own Hair"

http://beguiling.us/eljay/1944%20Pamphlet.pdf

HTH!
I just want to do what I want to do when I want to do it.