BOOMLAB - Sharing the Science of Boomerangs - Boomarology
The Descent of Rangs
The history of boomerangs is a large topic and not the man focus of Boomlab.org, but I can point you in the right direction.
As far as I am aware the largest study of this side of things is currently bein undertaken by Dutch thrower Harlod Hoogenboom
The only article I have here is "The Descent of Rangs" by UK thrower and writer Mark Holman-Lisney" which formed an edition of the Jounal of the British Boomerang Society in 2007.
Also the first section of the "Boomerangs - Aerodynamics and Motion" by Felix Hess has a large section on History