TY  - BOOK
TI  - Inventions and discoveries: warfare
SN  - 9780716603887
U1  - HS Ref 355.02 W23 2009 
PY  - 2009///
CY  - Chicago
PB  - World Book, Inc.
KW  - Military art and science--History--Juvenile literature
KW  - Military weapons--History--Juvenile literature
N1  - Includes index
ER  -