TY  - BOOK
AU  - Armentrout,Patricia
TI  - The screw
T2  - Simple devices
SN  - 1571031790
U1  - 621.8 
PY  - 1997///
CY  - Vero Beach, Fla.
PB  - Rourke Press
KW  - Screws
N1  - Includes index
N2  - Text and pictures introduce the screw, a simple machine used primarily as a fastening device
ER  -