Title: Yŏkchu Hwap'osik ŏnhae
Subjects: Gunpowder, Handbooks, manuals, History, Technological innovations, Artillery, Military Explosives, Poudre à canon, Innovations, Histoire, Artillerie, Guides, manuels, Explosifs militaires
Places: Korea, Corée
Time periods: 17th century, 17e siècle