TY  - BOOK
AU  - Zhang Xianyong
AU  - Zhang Xianyong
TI  - The story of gunpowder
T2  - Illustrated history of chinese science & technology
SN  - 9787508541259
PY  - 2019///
CY  - Beijing
PB  - China Intercontinental Press
KW  - Gunpowder
KW  - History
ER  -