1962 U.S. Army STOL Transport Requirement/Compatition

[Pioneer]

I’m wondering if anyone knows of the official title for the 1962 United States Army requirement for a STOL transport capable of carrying the same payload as the CH-47A Chinook helicopter, which lead to the acquisition of the De Havilland DHC-5 Buffalo (chosen as the winner of the United States Army competition in early 1963, which became the CV-7A and subsequently C-8A - i.e Request For Proposal ...........???
Also does anyone have any idea of the other designs submitted to this Request for Proposal??

Regards
Pioneer