TY  - BOOK
AU  - Porter,Alison
AU  - Davies,Eryl
TI  - How things work
T2  - Discoveries Library
SN  - 0-7835-9124-1
U1  - Ref. 608.03 H847 2000 
PY  - 2000///]
CY  - [s.l.]
PB  - Time Life Asia
KW  - Inventions
ER  -