The Hague declarations of 1899 (IV, I) and 1907 (XIV) prohibiting the discharge of projectiles and explosives from balloons. (Carnegie Endowment for International Peace. Division of International Law. Pamphlet no. 7)
この資料の詳細や典拠(同じ主題の資料を指すキーワード、著者名)等を確認できます。