TY  - MANSCPT
AU  - Oxlade,Chris
TI  - Screws
SN  - 978-1-59920-085-9
PY  - 2008///
CY  - Mankato, MN
PB  - Smart Apple Media
KW  - Scrrews
KW  - Simple machines
N1  - Elementary
N2  - There are screws all around us - from the cap on a bottle to the faucet in a kitchen.  But what are screws and how do they work?
ER  -