This might be stating the obvious but have you tried to do a google search for. Its a lot of fun going through all of the hits you'll get with how-to'S and youtube videos of building mongolian, korean, chinese, persian, turkish...etc. bows they all are constructed with various splices the larger number I have found seem to favour the V splice.
If you were thinking of more of a european type of bow then the Saami ...(maybe its just a Finnish bow) have made one from pine and birch. I beleive there was a bowyer here that made a replica of that. Following that there are a few Russian bows of similar mention.
I dont know if that helped but I hope it did.