TY  - BOOK
AU  - Porter, Porter
TI  - How things work
T2  - Nature Company discoveries library
SN  - 0783591241
U1  - 000 
PY  - 1996///
CY  - Hong Kong
PB  - Time-Life Books
N2  - ext and drawings explain the workings of certain everyday items including bicycles, traffic lights, and computers
ER  -