| 000 | 00621nam a2200181Ia 4500 | ||
|---|---|---|---|
| 020 | _a9781429631181 | ||
| 040 | _cPK-LaCSN | ||
| 082 |
_bEXT _a000 |
||
| 100 | _a"Winter, James De" | ||
| 245 | 0 | _aHow to catapult a castle: machines that brought down the battlements | |
| 260 |
_bCapstone Press _aMinnesota _c2008 |
||
| 300 | _a32 | ||
| 490 | _aFact finders Extreme | ||
| 520 | _a"Presents the science behind building and defending castles including the use of simple machines, such as pulleys and levers"--Provided by publisher | ||
| 942 |
_2ddc _cR |
||
| 999 |
_c245230 _d245230 |
||