TY  - BOOK
AU  - KNAPP,Brian
TI  - Science In Our World 20 : Starting And Stopping
SN  - 1-86418-042-0
U1  - 032. 
PY  - 1996///
CY  - Singapore
PB  - Regency Publishing
KW  - 0
KW  - Grade 7-9
ER  -