I picked up a pretty good book on E-bay on sale for $20. The name is "The Model 1903 SpringField Rifle And It's Variations". By Joe Poyer.
I thought I knew a little bit about the bolt action Model 1903 but boy was I wrong. I never realized how many different rifles they made, and the variations. It really makes you respect the old warhorse rifle.
Pick it up guys, it is a great read. Tom.