Here is Dave Canterbury presenting, for The Pathfinder School, a practicum in crafting a formidable bow with rudimentary tools and materials from the eastern woodlands: The Osage Bow (pt.2,3,4,5,6) That man demonstrates that he knows what he's talking about, and, if you listen with a modicum of attention, you too might run the risk of being mistaken for a savant.
By way of contrast, here is the construction of the traditional Korean bow, the hwal, -- a sinew-backed bamboo core with oaken handle and water buffalo horn belly, spliced with black locust or mulberry siyahs, glued with fish bladder and wrapped in birch bark, according to Wikipedia and probably the narration, the latter, albeit, in Korean -- by Bowyer, Kwon Mu-seok, in three parts (pt.2,3). (sorry, i guess number three gets cut off short --ed.)
Barely tangentially related are ancient martial secrets revealed at last by this guy & this guy.