TY  - BOOK
AU  - De Winter,James
TI  - How to catapult a castle: machines that brought down the battlements 
T2  - Fact finders. Extreme!
SN  - 142963118X (lib. bdg.)
AV  - UG444 .W56 2008
U1  - 623.4/41 22
PY  - 2008///
CY  - Mankato, Minn.
PB  - Capstone Press
KW  - Siege warfare
KW  - Juvenile literature
KW  - Military art and science
KW  - sears
N1  - Includes bibliographical references (p. 31), filmography (p. 31), and index; 5.1; Follett Library Resources; 3-6; Follett Library Resources
N2  - Presents the science behind building and defending castles including the use of simple machines, such as pulleys and levers
ER  -