↑ Bergin, Bob (2017-08-22). "High Aviation Ideals". HistoryNet (dalam bahasa Inggeris). Dicapai pada 2020-11-20. Colonel Gao, with several of the Hawks, went after the A5Ms... which were agile open-cockpit monoplanes, far superior to anything the Chinese had.... In the ensuing melee, Gao drove one down, then jumped by three others engaging him in a lengthy contest. Two A5Ms broke off while a third flew on, making loop after loop, its pilot dead at the controls. Gao was credited with two A5M kills, an impressive achievement.
↑ Gustavsson, Hakans. "Håkans Aviation page – Sino-Japanese Air War 1937". Biplane Fighter Aces - China. Dicapai pada 2020-12-21. 14 October 1937, at 16:00, 18 aircraft (three Hawk IIIs, three Martin 139WCs (B-10), two Heinkel He111s, five Douglas O-2MCs and five Northrop Gammas) took off from Nanking to attack Shanghai airfields and warehouses. They barely escaped the attack on their airbase by five Japanese bombers escorted by five fighters, which arrived about five minutes after they took off. The Japanese planes bombed the vacant airfield without inflicting much damage... a few hours later, starting at 21:00, one aircraft was sent every hour from Nanking to bomb targets in Shanghai until 03:00 on 15 October.
↑ Gustavsson, Hakans. "Håkans Aviation page – Sino-Japanese Air War 1937". Biplane Fighter Aces - China. Dicapai pada 2020-12-21. 14 October 1937, at 16:00, 18 aircraft (three Hawk IIIs, three Martin 139WCs, two Heinkel He111s, five Douglas O-2MCs and five Northrop Gammas) took off from Nanking to attack Shanghai airfields and warehouses... barely avoiding attacks by five Japanese bombers escorted by five fighters, that arrived over their airbase about five minutes after taking off. The Japanese planes bombed the vacant airfield without inflicting much damage... a few hours later, starting at 21:00, one aircraft was sent every hour to bomb targets in Shanghai until 03:00 on 15 October.
