I am going through your posted history and checking each entry in Hwang Kee's book. I know that in terms of academic validity, going to HK himself isn't the best option, but it is a great place to start.
Site: "1936 Traveled to China Grandmaster Hwang Kee at the age of 22 was a Master of Tae Kyon"
Book: 1936 - began martial arts studies in Manchuria, China
Site: "1947 Created the 3 Gicho Hyungs"
There is no reference to this in his book, but it is corroborated in several other Federation references. Exile may have some insight into this, as these forms exist in almost exactly the same form in several Japanese styles as Taekyoku I believe. Exile will know for sure and may have some references.
Site: "1974 Contacted dan members in the states about forming a USA TSD Federation"
Book: Oct 1974 - US SBD MDK General convention meeting held of all USA Dan members in Burlington, NJ"
Everything else is basically the same between the site and the book. Some wording differences, but the same ideas.