引用・参考資料等<br><a href="https://airandspace.si.edu/collection-objects/helmet-flying-protective-type-p-1a-united-states-air-force/nasm_A19800071000" target="_blank" rel="noopener nofollow">https://airandspace.si.edu/collection-objects/helmet-flying-protective-type-p-1a-united-states-air-force/nasm_A19800071000</a><br><a href="https://cfhelmets.com/wp-content/uploads/2025/03/A_History_of_US_Aircrew_Flight_Helmets_and_collecting_flightgear.pdf" target="_blank" rel="noopener nofollow">https://cfhelmets.com/wp-content/uploads/2025/03/A_History_of_US_Aircrew_Flight_Helmets_and_collecting_flightgear.pdf</a><br />youtubeの方<br><a href="https://www.youtube.com/c/AdmiralyukkurimilitarybyRetoRooRaa/videos" target="_blank" rel="noopener nofollow">https://www.youtube.com/c/AdmiralyukkurimilitarybyRetoRooRaa/videos</a><br>ボクのツイッター<br><a href="https://twitter.com/retoro_V" target="_blank" rel="noopener nofollow">https://twitter.com/retoro_V</a><br>キャラデザイン<br>CaraCorn様