From what I've learned over the years is that GM Hwang Kee's main training comes from China, he train with the Chung Do Kwan Tang Soo Do under GM Won Kuk Lee for a short time and it's widely believe this is where he learn the pyong ahn's and most of the other hyungs, I also know Kim Ki Whang also helped GM Hwang Kee learn most of teh Hyungs (kata) that makes up the Tang Soo do Hyungs, as for the rest, I'm not really sure he ever really learned those hyungs, as for the book we all know you can only learn so much from books they help, but they don't teach you the finer point of the hyungs.
Ken Barrett
Ken Barrett