Researcher looking for details on air missions flown in support of 23rd Infantry Regiment in the Battle of Chipyong-ni, February 1951, for academic paper/ professional writing publication. Seeking details on specific air units and missions flown that is not available in general histories of the battle/war, for air reconnaissance, aerial observation, air transport/resupply, aeromedical evacuation, close air support, interdiction and any other aerial missions (e.g. flare drop/night illumination) by all branches of the service flown in support of the valiant men on the ground at Chipyong-ni.