Generally there isn't a lot of interest in those and a lot of them end up as parts donors for other drums or 12x15 tenors and snares get a new life as floor toms. I'm not familiar with any books on these type of drums in particular. There could be a website devoted to them but I've never searched for such a thing.
I agree that these vintage drums can be pretty cool but there just isn't a lot of usage for them so they are more of a "collectible" to have or display than something people still use. The technology of marching drums has progressed much further than that of regular drums due to the way that style of playing has evolved so, while it's still perfectly possible to use a vintage drum set to play a gig, it would be difficult for a marching squad to take to the field with old drums and remain competitive.
On the plus side this stuff tends to be relatively cheap to buy. Your best initial resource to learn about them would be old catalogs from the various companies. They tended to get pretty detailed about their various marching lines and some companies had special catalogs dedicated just to those drums. A lot of these catalogs have been scanned and can be found on the net.