TY  - BOOK
AU  - BRIDGMAN,Roger
AU  - Louise Pritchard
TI  - 1000 Inventions & Discoveries 
SN  - 1-4053-1419-2
U1  - 500.3 
PY  - 2006///
CY  - London 
PB  - A Dorling Kindersley Book 
KW  - 0
KW  - Grade 7-9
ER  -